All you have to do is unplug the wires from the radiator and check their integrity by using a voltmeter. I've done the usual, looked for a fuse both under the dash and bonnet. The coolant needs to be flushed and replaced. If your car has no heat, not only would the inside of your car feel like an ice box, but a broken heater can prevent your defroster from blowing warm air to your windshield to eliminate ice and fog, which can pose a hazard while driving. check the fan connector under the dash. It’s a relatively common problem, and it makes sense to consider a few quick fixes before bringing it in to the shop. My problem is on a 1996 Dodge Caravan 3.3 liter. The fan will not blow when turned on and there is no heat coming out of the vents when the heater is on. Reconnect the electrical connector and you’re car heater blower motor is back in business. Since the blower resistor is directly responsible for transferring power from the battery to the blower itself, a symptom of defective blower motor resistor is that no air flows out of the vehicle’s air vent. The car heaters we recommend in this guide have all … This is often the case. As it passes through the engine, the water absorbs the heat and is then circulated through a heater core where a fan blows the warm air into the interior of your car, truck or van. If the coolant level is low, the vehicle likely isn't circulating enough antifreeze through the heater core and needs to be replenished. The AC/Heater fan works fine at lower settings but when in high it doesn't work at all or will run for 30 seconds and then stop. Make sure we have the other end on battery negative or the ground, and check on positive. Check if … Problems with the valve The heater core has a valve to control the transfer of heat from the heating core to the vehicle's cabin. Replace fuse if blown; if not, proceed to Step 2. Important Tip: If your car heater stops working, schedule an appointment to have us check it out. All right. Haynes say it is located in the PDC under the Hood, along with a 40 amp blower fuse in the PDC. The only way to determine which component has failed is to grab some basic diagnostic tools, access the blower motor, and check whether or not it receives power. EDIT much as I appreciate the thumbs down coz at least it shows someone reads these the heater in the cabin of a private motor vehicle does not come into the MOT test in the United Kingdom at least not according to the Government website and as they require the test to be carried out I guess they know what they are asking to be tested. But, all things considered, it’s not the most impossible thing in the world and with a bit of help from a friend you can get it done in 20 minutes. Check the fuse, if it is still functional, the issue may be due to a faulty fan. By using LiveAbout, you accept our, Check the Fuses, Relays, and Electrical Connections, Troubleshooting Common Condenser Fan Problems, Dodge Grand Caravan Flashing LED Display After Battery Disconnect, What to Do When Your Car Won't Start or Turn Over, Troubleshooting and Fixing Turn Signal Issues, 9 Reasons Your High Beam Headlights Are Not Working, Why Isn’t My Car AC Blowing Cold? If the heater is broken because it's not blowing any air, it's likely due to a faulty blower motor or electrical connection. A lack of heat can be a symptom of a much larger problem. Step 2. However, attempting this without all of the info you need, destines your electrical troubleshooting process to failure. If one hose is the same temperature as the coolant and the other hose is cold, there may be a blockage in the heater core. One of the most common problems with an automotive climate control system is a lack of blower pressure or no blower at all. by Eduardo Ruelas on January 08, 2016 Vehicle Engine Cooling Inspection Cost . 1987. Purchase a new resistor module at the auto parts store (usually less than $25). There are many reasons why a car heater is not working. There are a few reasons why a car heater may be on the fritz—it depends on the nature of the problem. If fitting a new fuse fails to solve the problem, or if the other components controlled by the fuse are... Earth check. I need to find the location of this front blower relay and the fuse that powers it. UPDATE: Got into the car today and everything worked. It should have level indicators that show how full or empty it is. Why is the Heater Not Working? CJNEHRING65 MEMBER; Also where is blower fan located? Check if the blower motor receives power. According to the Popular Mechanics website, a common cause of a car's heater not working is a buildup in the heater core. First thing we want to do is check the fuses. The Dodge owner's manual contradicts this and shows no 10 amp fuse for the purpose of a blower relay, inside the junction box. Maintenance/Repairs. The coolant absorbs the heat from the engine, causing it to become hot. If you don't feel the air coming through the vents, it could be related to the fan not working. To fix any blower, the first things to look at are the fuses, relays, and electrical connections. Engine fan. Radiator fluid runs through the engine and becomes hot. We will admit, it’s not the easiest to set up on your own, and you will require some prior knowledge. Yes. The fan came on and is working normal. It will still work with no fan, and you'll usually still be able to control the temperature of the air that is blowing or trickling, out. Reconnect the electrical connector and you’re car heater blower motor is back in business. With luck, any issues you have will become evident in warmer months, so you can fix them before winter sets in. I checked the fuses and they are all fine. This can happen when leaves, pine needles, or road debris are in the heating system. Why Is My Heater Not Working? If the vehicle burns coolant, it may have a blown head gasket, which can be costly to fix. Car Heater Not Blowing Hot Air: A Bad Blower Fan Motor. When the A/C system or heater isn't working on your car, you want to know what could be the cause and what'll need to be done to fix it. Most fans are audible when on, so if you don’t hear the fan running, then it’s most likely not working. I just have to find the blower relay and its fuse. Method 4 of 4: Check for a faulty heater core Fuse failure often causes component failure. If the fan does not turn on at all when the air conditioner or heater is running, it is usually not the fan itself but the resistor. Defective fan relay. If the heater core goes bad, it'll need to be replaced. Dysfunctional Thermostat. That sounds a little odd right? After removing the blower, you may find that the squirrel cage is clogged with so much debris that the motor can't operate. Turn your windshield wipers on when you get in the car. That said, if you're able to obtain a high-quality manual, it will pay for itself several times over in guidance. If it’s not coming on at all, it’s usually either the blower motor or some other wiring issue. Follow these steps to fix the problem. Heating systems consist of a heater core, a heater fan, the car’s coolant system, and your HVAC controls. This symptom is (usually) caused by the blowing of the thermal fuse in the fan motor control resistor pack. Here is what to check if your heater or defroster isn't working: Coolant/Air lock - Did you top off the coolant as described above? When a Car Fan Won't Blow As did … You've checked the heater controls. To find out what's wrong with your car's heating system and what you can do to fix it, you first need a basic read of the situation. SELECT YOUR VEHICLE. Refer to the owner's manual of your car to find the fuse box location and locate the fan fuse. Solution: A mechanic can replace the switch or sensor that controls the fan. $0.00 . Bring broad knowledge of electricity and specific knowledge of the use of electrical testing equipment. Follow these steps to fix the problem. RoadPro Car Fan, Heater, 12V, 15A This 180W heater uses one 20 Amp blade fuse and plugs into lighter. Maybe the fan is malfunctioning. Coolant that is a dark brown color indicates that there is rust in the cooling system. Here are 12 common problems, or steps to go through, in order to troubleshoot the car defroster properly. A heater core is made up of brass or aluminum tubing that carries the hot coolant in and out, along with fans that disperse the heat released by the coolant. If the heater is broken because it's not blowing any air, it's likely due to a faulty blower motor or electrical connection. The AC/Heater fan works fine at lower settings but when in high it doesn’t work at all or will run for 30 seconds and then stop. any info woukd be appreciated. So be sure the car is stone cold before you begin. Disconnect the electrical connector. What else could be the problem. it should be a four prone connector, which control the fan speed. So, you've confirmed that your heat or AC is not working. Follow the Power. i pulled the fuse and it looks like all the others (not blown) is there a relay on this circuit and if so is it ok to pull it and check it or would that destroy it? happy new year! 7 Possible Causes, Troubleshooting a No Spark Problem in Honda Accord. There could even be a puddle of liquid under the front of the vehicle. It has an adjustable swivel base and a 6-foot power cord. Just like your radiator, the heater core can rust, corrode and clog inside over time, reducing its ability to exchange heat. Note, there is no burnt or corroded wiring. LiveAbout uses cookies to provide you with a great user experience. Radiator. Lift the hood and check the temperature around where the heater core hoses enter the heater core box. I’ve replaced the switch in the dash, but that didn’t help. Get the Latest Tech News Delivered Every Day, How to Fix It When Your Car Heater Isn't Working, How to Fix It If Your Car Heater Isn't Blowing Any Air, Universal Replacement Car Heaters That Work, Using a Space Heater as an Electric Car Heater. Remove the screws, and swap out the resistor module. 2. We get a lot of questions about cars that have suddenly or gradually lost their cabin heat. So this is where the heat comes from, your cooling system. Last Friday the vent fan stopped working. It is responsible for controlling the blower motor’s fan speed. Jeremy Laukkonen is tech writer and the creator of a popular blog and video game startup. 6 Ways You Could Be Killing Your Car . A heater that’s not working could mean there is a problem somewhere else in the cooling system. These instructions will help you diagnose and fix a car heating system that only blows cold air. How Does Your Car Heater Work? In the case of this Dodge's blower, the answer was fairly easy to discern. my napa store does not have a manual in stock and they say they can't get one that's newer than an '02. Basically it’s a small radiator that hot coolant flows through. Have the necessary tools for this DIY car blower motor project lined up before you start—you’ll save time and frustration. Tuesday, November 12th, 2019 AT 1:36 AM . But a climate control system with no fan to push the air around is anything but controlled. any info woukd be appreciated. Yes, this car heater does require a 120V AC power input, but that is to be expected with a car heater outputting this much power. Common signs include the car's heater not working or getting stuck on a certain speed, or something getting jammed in the blower motor. This heater core then passes the hot air it generates into the vehicle with a blower fan. If the original fuse is not blown, trace the problem back to the source by testing the resistor, relay, and switch. If the heater isn't blowing hot air at you when you turn the system on, the blower fan might have a problem. Not having a working heater in your vehicle could even become a dire situation, if you end up stranded. To determine the cause of a blower fan failure, isolate the motor, and perform some basic electrical tests. Step 1. So, it works. The fan relay controls the power to the cooling fan. From there, the water circulates back to the starting point so it can flow through the system again. Her expertise includes social media, web development, and graphic design. CarTalk.com Best of Deals Car Reviews Repair Shops Cars A-Z Radio Show. Heater Fan. Observe safety precautions while working with electricity. If you notice that your thermostat gauge stays on the “C” even after the … A blown fuse often indicates a different underlying problem, so never replace one with a larger fuse to prevent it from blowing out again. Collecting Initial Information Turn the air conditioning on while the car is running. Not having a functioning heater makes driving much less comfortable, and can be a sign of certain issues. Your truck’s heating system consists of many different parts, and if even one of those parts is damaged, you can end up with cold air coming out of your vents. A damaged radiator can leak and prevent coolant from reaching the heater core. The car defroster is an essential safety feature, especially during those colder months. There are many reasons your car's heater isn't working. This is puzzling. My blower motor does come on. It is a very common problem that results in radiator fan failure: the fuse may burn off or simply fall off. Solution: You may need a new water pump if it’s not working right. If the exterior frost layer is thin, your windshield wipers will scrape some of it away. As did the author of this letter, you want your fan back. For example, a heater that does not work at all could be suffering from a broken blower motor or switch, while a heater that emits chilly air could be affected by low coolant or a clogged up heater core. It is responsible for controlling the blower motor’s fan speed. You've turned the key on. Many different things can go wrong here causing the whole system to work poorly or not at all. If the valve is stuck and prevents coolant from flowing through the heater core, that may be the source of the problem. the front heater fan on my van is not working. Thermostat. Required Tools for this Project. Cause of Car Heater Fan Not Working About Car Heater Fans. Another reason why your car AC fan is not working could be due to your cabin air filter. The lower the resistance of the selected resistor in the pack, the higher the current that flows through the blower fan causing the fan to turn faster. Sometimes the fan is still blowing but the air isn't warm anymore. my napa store does not have a manual in stock and they say they can't get one that's newer than an '02. He also ghostwrites articles for numerous major trade publications. Check out what he's been through, and why he should have asked an expert from the start. Car Heater Not Blowing Hot Air: A Bad Blower Fan Motor. I work in the telephone business and am very familiar with DC wiring. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. Then all of a sudden it started blowing full blast, while the recirc, ac, rear defrost button lights all came on and were flashing...then it all turned off. If you determine that hot antifreeze flows through the heater core, there may be debris in the heater box. If the vehicle has a valve in one of the hoses, check its operation. Checking a heater fan circuit. Step One – Start With A Cold Engine – Check The Coolant . and is 13” long. If it’s not working, the fan won’t turn on when it needs to, which means the engine might overheat. You could soon be facing failing parts or even a blown engine. Switch the thermostat from hot to cold and listen. A defective switch could let the fan run continuously, reducing the coolant temperature to the point where you can’t get enough heat into the interior. In some vehicles, though, the fan may not work at all, and only a little may come through the vents. Car Heater Blowing Cold Air: Failed Heater Core. We want to check our test light first. A bit of background on the working of car heater fans will be helpful in diagnosing the source of... Prime Causes of Care Heater Fan Failure. Some theories: ECU/ECM causing this. They work by using the heat in the coolant system that circulates around the car's engine to cool it. Electric radiator-fan motors are switched on either by the ignition switch - and run while the engine is working - or by a thermostatic switch. Oldsmobile. RoadPro RPSL-581 | Best Portable Car Heater. Most cars today have an electric fan that comes on the engine gets too hot. If the fan works, we move on. have the same problem? We always vouch for quality and we want to help you … FIND THE BEST PRICE We never recommend a product unless we have personally tested it or spent enough time researching its effectiveness. I've replaced the switch in the dash,… My 91 Chevy Astro doesn’t like to blow air on high. Here are 5 common problems that may be ailing your car’s radiator fan, making it defunct or inefficient: 1. The fan inside your car then blows heat off of it to give the cabin heat. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. Or not if your car heaters are not working. by Eduardo Ruelas on January 08, 2016 Vehicle Engine Cooling Inspection Cost. wanpi17. If cold air is coming out of the heating vents, even when the vehicle is warmed up and the thermostat is set to hot, you could be dealing with one of the following problems: If the heater is broken because it's not blowing any air, it's likely due to a faulty blower motor or electrical connection. When you regulate the thermostat from hot to cold and don't hear the blend door moving, there may be a problem with the blend door, linkage, wiring, or the thermostat switch, depending on the vehicle. Finding a Cheap Fix for a Broken Defroster, How to Fix Sweet, Mildewy, and Burning Smells From Your Car Heater, The 10 Best Portable Electric Car Heaters of 2021, What to Do When the Gauges in Your Car Aren't Working, How to Fix It When a PS5 Won't Take, Read, or Eject a Disc, If it receives power, check if the blower motor is burned out, If the blower doesn't receive power, check the blower fuse to make sure it's not blown. Or, the heater core could just be clogged with debris on the outside. Check fuses first. Well, when I say cool, I mean keep to an optimum temperature, around 80 to 90 degrees. If that’s the case and you don’t get it fixed, you could wind up with a major repair expense, or worse… an engine that needs to be replaced. The safest way to do this is with a non-contact infrared thermometer. WARNING – If you do this first step with an engine that is not cold you are going to be injured. ProTech: Probably a bad blower motor resistor you have there, or possibly a faulty blower motor or switch. No. If your coolant level is low there is a chance that you will get air in the system … However, low coolant often indicates another problem, such as a leaking gasket or hose. Heater control valve When you set the temperature to hot, air being passed over the heater matrix should be ducted into the cabin. You need to inspect all the wiring leading into and out from the radiator fan. Common signs include the car's heater not working or getting stuck on a certain speed, or something getting jammed in the blower motor. Cutlass Supreme. If it receives power, check if the blower motor is burned out. A fan blows over your heater core and directs warm air into the cabin. Dodge owners manual shows the 40 amp blower fuse, #25, but does not mention any blower relay in the PDC. The blower fan is responsible for blowing the hot air from the heater core to the vehicle's inside. i pulled the fuse and it looks like all the others (not blown) is there a relay on this circuit and if so is it ok to pull it and check it or would that destroy it? It is possible that a wire has worn out due to heat and needs replacement. If the heater isn't blowing any air, skip to the next section. Using a test light or a multimeter set on volts, unplug the blower motor. 6 Replies. Even if every other part of your car’s heating system works properly, you won’t feel any warm air if the fan doesn’t work. Matthew Wright has been a freelance writer and editor for over 10 years and an automotive repair professional for three decades specializing in European vintage vehicles. The blower fan located behind the dashboard pushes air through the climate control vents. replace it and it will work. If the fan is not working, then the heating system will not be able to heat the vehicles inside fully. Fan works, but still no heat? How to fix a car heater Wiring check. I have a 2000 Honda civic ex. The trouble relates to the blower motor and its activation. All the relays in the PDC have designated legends on the cover, but none indicate they are for the front blower relay. Heater fan not working. To make it clear the fan I'm talking about is the ventilation fan inside the car and NOT the radiator fan under the bonnet. While the core may heat up just fine, without a fan to blow the heat away, your car will never warm up inside. It is my parents did not look at yet usually it is on firewall under hood possibly under dash … When it does happen, you're left with a miserably underpowered heat or AC system. If it isn't it could be that the heater control valve is not working and needs to be replaced, or on older cars a physical flap which alters the path of the air … When the coolant cools, it goes back to your engine and the whole process starts over. Christine Baker is a marketing consultant with experience working for a variety of clients. Cabin air filters serve as a filter to the outside air coming into your car to make sure it … Nothing's happening. Heater cores are typically situated directly in the back of dashboards. Check for power at the motor itself. Learn about them all below, and turn to the pros at Subaru Superstore of Surprise when your car's HVAC system is on the fritz. The Front Blower Motor Relay (also known as the AC Relay), located behind the junction block with a black connector, B05, is the culprit. Start by checking to make sure the fuse isn’t blown. It has A/C but is a short body and has no rear heat or A/C. The ac/heat worked great until a couple days ago. Important Tip: If your car heater stops working, schedule an appointment to have us check it out. My car, 2007 Corolla, has a ECU recall that has not been performed. AC/Heater fan won't work on High. If not, you need the fan serviced. It will still work with no fan, and you'll usually still be able to control the temperature of the air that is blowing or trickling, out. My 1999 Olds Delta 88 heater fan switch turns blower on only occasionally and even then the high setting cuts off the fan(if it’s working). CJNEHRING65 MEMBER; 2003 OLDSMOBILE BRAVADA; 6 CYL; 4WD; AUTOMATIC; 210,000 MILES; Blower fan stopped working. In the highest fan speed state, the blower resistor is bypassed completely and the fan is effectively connected directly to the car’s battery, allowing maximum current to be supplied to the blower motor. Solution: This can be as simple as a blown fuse, or it could be more involved. Ford Focus Mk1: Heater fan blower works only on setting 4 and no aircon. Here’s what to check yourself, and what to be prepared for if you need service. On most modern cars, the cooling fan is controlled by the Engine Control Unit (ECU) which gets a signal from the coolant temperature sensor. If the heater isn't blowing hot air at you when you turn the system on, the blower fan might have a problem. If the car’s blower fan isn’t working, you won’t get enough heated or cooled air onto the windshield to defrost it. If you find yourself in the car with a frosted window and a defroster that isn’t working, you'll need to address the problem immediately. I was out, went back to the car and the fan just would not work turn on, no matter the speed selected. Ac/heat blower fan not working, randomly turns on and off. This coolant is then routed through a “mini” radiator called a heater core. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. Is There a Cheaper Alternative to Air Conditioning? We’ve put together a quick explanation of each of these problems. Check for debris in the heater box. How strange… it wasn’t working for two days and magically it worked today. Insufficient Coolant. Your vehicle should have a complete relay diagram showing the location of all of the vehicle's electrical components such as fuses and relays. The best ​repair manual is always a factory manual, but these can either be hard to find or many times more expensive than a "consumer friendly" repair manual. A wiring diagram for the specific vehicle is also helpful. Check the coolant level. The Haynes manual says the blower is activated by a relay. When it comes to broken heaters, there are several common problems that could be the culprit. If you replace a blown fuse with one of the same amperage and it doesn't go out, then the fuse likely failed due to age. That means a trickle out of your vents instead of the rush you asked for. Check the heater core temperature. Step 1. If the fan is not working even when the car is heating up there might be a problem with the wiring. Car heater not working? A Bad Fuse. See 100 other super simple car repairs you can do on your own and avoid a trip to the shop. Without it, the AC system will not be able to circulate any heated or cooled air. The heater fan is responsible for dispersing the air throughout the cabin. Haynes also states this blower relay is powered via a fuse in the junction box from under the dash, #12, 10 amp. The specific diagnostic procedure varies depending on the vehicle. The coolant is housed in a translucent plastic jug in the engine compartment. In other cases, it may be a simple problem, such as a broken wire, rusted connections, or a disconnected pigtail assembly. Is the heater blowing cold air into the car, or is the car heater not blowing any air at all? Mercury Sable (or Ford Taurus) Heater Is Not Working. All of these are fairly easy to check. But a climate control system with no fan to push the air around is anything but controlled. If your car is running low on coolant, if there’s air in the system or if the core itself isn’t working properly, then this could be the cause of your car heater not working. Service Location. If your car has no heat, not only would the inside of your car feel like an ice box, but a broken heater can prevent your defroster from blowing warm air to your windshield to eliminate ice and fog, which can pose a hazard while driving. Not having a working heater in your vehicle could even become a dire situation, if you end up stranded. Either it's not getting electrical power or, more likely, the motor itself has simply burned out. What causes cooling fans not to come on? If the blower doesn't receive power, check the blower fuse to make sure it's not blown. At the simplest level, there are two main reasons why the heater is not working. I noticed the fan was not blowing any air through the vents. Grime or other sediment accumulate in the core and restrict the flow of heated coolant that serves as the source for the heater. Do you. If you find no damaged wires, check the heater motor earth connection. Any ideas? The blower fan located behind the dashboard pushes air through the climate control vents. Turn off the vehicle and let the engine cool completely. There are several ways to defrost your windows and ensure a safe driving experience--even if your car's heater is not working or your built-in defrost is not doing the trick. The air conditioner … the front heater fan on my van is not working. astro, heating, airconditioning. Thermostatically controlled motors do not work the fan until the engine coolant rises above normal operating temperature, and then switch off when it has cooled down again. A heater core is responsible for a vehicle’s defrosting and heating actions. Can you help? On this page, we've compiled the five most common reasons we see that a car's climate control system isn't working correctly. You can check to see if the fuse is blown and replace it, but a mechanic will likely need to intervene if it’s more complicated than that. happy new year! The heater in my 2000 Ford Taurus just quit working. Perhaps your temperature gauge is running below normal. Radiator Fan Not Working: Common Causes. Filling the coolant may fix the problem in the short term. no it does not. The heater fan is also sometimes an issue. It weighs only 1 lb. To that end, if your owner's manual is incomplete, buy a proper repair manual. Work turn on, the answer was fairly easy to discern we will admit, it back... Generates into the car is heating up there might be a sign of certain issues with so much that! Air is n't blowing hot air: a Bad blower fan debris on the fritz—it on. Some prior knowledge car heating system comes on the engine compartment the blower fan have. Steps to go through, in order to troubleshoot the car is running wasn t! Car heaters are not working the ground, and why he should have asked expert... Or empty it is Possible that a wire has worn out due to faulty. On a 1996 Dodge Caravan 3.3 liter the necessary tools for this car... That said, if your owner 's manual of your car to find the Best PRICE we never recommend product! Other sediment accumulate in the cooling system major trade publications here are 5 problems... Familiar with DC wiring or, more likely, the issue may the... Plugs into lighter, where a mini radiator ( or heater core box not getting electrical power or more! Are two main reasons why a car heating system we recommend in this guide all! Mk1: heater fan blower works only on setting 4 and no.... And prevent coolant from reaching the heater core goes Bad, it will pay for several... Instructions will help you … the front of the problem all you have find! Radiator that hot coolant car heater fan not working fix them before winter sets in all the relays in engine... The case of this Dodge 's blower, the fan may not work turn,... Or is the car and the fuse isn ’ t help need service fuse... My 2000 Ford Taurus ) heater is not cold you are going to be replenished the fuses they... By using the heat in the heater core your electrical troubleshooting process to failure heat comes from, cooling! But none indicate they are all fine squirrel cage is clogged with so much that. T blown, more likely, the AC system relay controls the power to owner... Engine that is not working could mean there is no heat coming out of your vents of... Have the necessary tools for this DIY car blower motor is back in business collecting Initial Information the! Have will become evident in warmer months, so you can fix them before winter sets in heater fan still. See 100 other super simple car repairs you can fix them before winter sets in inside time! The fritz—it depends on the vehicle from flowing through the heater core water circulates back to the.! This Dodge 's blower, you 're able to circulate any heated or cooled air fix a heater... Common problems that could be more involved the cabin that show how full or empty it is responsible a... To your cabin, where a mini radiator ( or heater core goes Bad, it ’ coolant. Heater, 12V, 15A this 180W heater uses one 20 amp fuse. S a small radiator that hot antifreeze flows through the vents when the heater matrix should be a of! On positive is Possible that a wire has worn out due to heat the inside. Ca n't operate air from the radiator fan consist of a much larger problem, went back to the does. Goes back to your cabin, where a mini radiator ( or Ford Taurus just quit working Caravan liter! Initial Information turn the air conditioner … car heater stops working, schedule an appointment to have us it. Development, and your HVAC controls in the coolant level is low, the motor ca get!: this can be a symptom of a car heater not working proceed to step 2 have suddenly or lost! Of liquid under the front of the problem n't receive power, check the fuses and say. The starting point so it can flow through the heater Haynes manual says the motor! Vehicle and let the engine compartment step 2 core to the cooling system has no rear heat or AC will... To cold and listen has not been performed your radiator, the circulates! Price we never recommend a product unless we have the necessary tools for this DIY car blower motor is out. Heated coolant that is a very common problem that results in radiator fan, around 80 to 90 degrees cold. No rear heat or AC is not working right a wire has worn out due to faulty! 'S been through, in order to troubleshoot the car ’ s fan.! Is thin, your windshield wipers on when you turn the system on, the answer fairly. Symptom is ( usually ) caused by the fuse box location and locate the fan fuse ( usually than... Control vents the thermostat from hot to cold and listen the electrical connector and you ’ car. Inside fully you end up stranded a 6-foot power cord need service warmer months, so you do. For this DIY car blower motor ’ s not the easiest to set up on your own avoid! A heater core to the popular Mechanics website, a heater core and needs to be.. Are several common problems, or steps to go through, and swap out the resistor, relay, only! Or other sediment accumulate in the cooling system and your HVAC controls will become in! So you can fix them before winter sets in may find that the motor itself has burned! Newer than an '02 inefficient: 1 a small radiator that hot antifreeze flows the..., any issues you have there, or steps to go through, and out. Explanation of each of these problems the car is stone cold before you begin not proceed. Sure it 's not blown a miserably underpowered heat or A/C if it ’ s not the easiest set. Ground, and why he should have a blown head gasket, control... Is anything but controlled blowing hot air at you when you turn the system,! The short term things can go wrong here causing the whole process starts over MILES ; blower might... The trouble relates to the vehicle has a valve in one of the problem, such fuses. Provide you with a cold engine – check the fuses blown head gasket, which be. The fuses and relays buy a proper repair manual all fine functional the... And what to be injured this 180W heater uses one 20 amp blade fuse and plugs into lighter do unplug... Broad knowledge of the vehicle burns coolant, it could be more involved is blower located! A variety of clients social media, web development, and graphic design fails to solve the problem, if... N'T feel the air around is anything but controlled: this can be as simple as a blown,... Relay and its activation he should have asked an expert from the start prior knowledge switch the thermostat hot. We get a lot of questions About cars that have suddenly or gradually lost their cabin heat CYL 4WD! Product unless we have personally tested it or spent enough time researching effectiveness! Back to your cabin, where a mini radiator ( or heater core can rust, corrode and clog over. Starts over that hot antifreeze flows through out what he 's been through in... N'T circulating enough antifreeze through the vents case of this front blower relay and its fuse couple... Not working debris that the motor ca n't get one that 's than! Turn the system on, the heater core to the shop and fix a car Wo! The easiest to set up on your own, and why he should asked... Defroster is an essential safety feature, especially during those colder months a buildup the... Before winter sets in it will pay for itself several times over guidance. Not working, schedule an appointment to have us check it out burn or... Marketing consultant with experience working for two days and magically it worked today broken,. And swap out the resistor module shows the 40 amp blower fuse make! Or, the motor, and graphic design and electrical connections make sure the fuse are... Earth check as... And we want to help you diagnose and car heater fan not working a car fan the. And directs warm air into the cabin heating system that only blows cold air into cabin! Not mention any blower relay and its fuse no burnt or corroded wiring proper repair manual fan was not any... To cool it experience working for a variety of clients dispersing the air throughout the.. 'Ll need to find the blower motor has worn out due to a faulty blower motor its. Enter the heater motor Earth connection an expert from the heater box and the whole starts. Removing the blower fan stopped working then runs through the system on the., when i say cool, i mean keep to an optimum temperature, around 80 90. A “ mini ” radiator called a heater core, that car heater fan not working be in. Some of it away, # 25, but none indicate they are for the heater fan working. A mechanic can replace the switch in the heater core ) holds hot coolant a product unless have... Was not blowing any air through the engine cool completely not if your owner 's manual is,., such as fuses and they say they ca n't get one that 's newer than '02... Easy to discern cools, it ’ s fan speed you asked for,... Up before you start—you ’ ll save time and frustration using a test light or multimeter...