So get out there and give it a … The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. The fan does nt work. Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST. That's what we're gonna test for. Ken Mattson, owner of Len’s Automotive in Bellevue, Wash., says a car heater can stop working for a number of reasons, including: • A low antifreeze/water level in the radiator due to a leak in the cooling system. Now where is this resistor board in your car. I checked and the 30 amp "circuit breaker" is ok. So I bought that and replaced it myself. And then, disconnect the connector. document.write(new Date().getFullYear()) Oh yes, take the old part with you so you can match the parts. When it’s defective, the valve may not open to allow the coolant into the heater core, and it may leak coolant. The most popular service booked by readers of this article is Vehicle Engine Cooling Inspection. @lex317. This is a 94 Mercury Tracer. Well it is directly on the other side of your glove compartment shelf. This may be a thermostat issue where the thermostat is not closing at the right temperatures resulting in the coolant running continuously throughout the motor which does not allow the engine to reach normal operating temperature. They were fine. The heater control valve controls the flow of coolant to the heater core when the heater or defroster is turned on. I would say the resistor from the dealer would be $5o and wait for it to arrive. Either it's not getting electrical power or, more likely, the motor itself has simply burned out. Helpful Leave your answer . you will start at the blower motor itself, hotwire it with power and ground, if that works then work your way backwards in the system, the blower resister is usually next in line and a big problem on many cars. In some cases, the problem might have nothing to do with coolant: If your blower only works on the highest setting, your blower motor control module probably needs to be changed. Cutting out. 06/27/2019 by 31% of the time it's A small amount of hot coolant is diverted into a hose fitted into the firewall and then into a small heat exchanger or heater … Once its out, file the brushes touching the armature and you are good to go for another one or two years. The mechanic checked the fuses. I then shut off my car and ran my errand, and when I came back out the blower was suddenly working exactly the way it should. How to Replace an Evaporator Temperature Sensor (Switch), How to Buy a Good Quality Heater Blower Motor Resistor. Get a fair & transparent quote instantly before booking. It is responsible for controlling the blower motor’s fan speed. So, a problem with the vehicle's cooling system might also cause the heater to underperform or stop working. xCALIWEBKINGx SNFx. You need two needles or strong pins which you need to insert in the jack from sides of the pins. Fast, free online quotes for your car repair. In some vehicles, though, the fan may not work at all, and only a little may come through the vents. New part 700.00 - no return if this wasn't the problem. I have a 2003 Accord with the same problem. Any suggestions? The fan is powered by a motor and derives power which is routed via fuses installed in the dashboard. The blower fan is responsible for ventilating that warm air from the heater core through your car’s vents! Not Enough Coolant. Another common symptom of a faulty blower motor resistor is a a blower motor that does not function on certain settings. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. It is responsible for controlling the blower motor’s fan speed. So I pulled the resistor pak, but not sure if that is working or not. Once the problem has been diagnosed, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. As you may know,... determine if the component should be replaced. After a month without a car (too cold outside to work on it) and much online searching, testing of fuses, resistors etc etc a Honda mechanic my grandson knew suggested to him that it most likely was the whole heating unit that was blown. Reasons Your Car Won't Heat | Heater Stopped Working Heat in automobiles is supplied by hot coolant circulating through the engine. LEARN MORE. The blower motor generally is underneath the dash on the passenger side. You will find this fits other year Honda cars so have a look before passing a possible vehicle. The blower motor resistor is an electrical component that is a part of the vehicle's heating and air conditioning system. Car Heater Blowing Cold Air: Low Coolant Level Counterintuitively, the same system that keeps your engine cool is responsible for the heater working. Shop said if I could prove it was something they had done, they would fix problem. Terms — Removal of the right side dash trim is usually all it takes to access the heater/blower area of the vehicle. The most common cause of a failing heater core and heating system, in general, is dirty coolant. You will need direct access to the motor to do this. He said blower motor might be bad. Make sure your key and your heater switch is turned on before you … This can cause the heater core to clog and fail. Don't know if you got your problem fixed - it's an old post but here's what we did. If the blower motor resistors’ internal components fail it may cause the blower motor to malfunction, or not function at all on one or more … If the blower motor resistors’ internal components fail it may cause the blower motor to malfunction, or not function at all on one or more of the settings. K. Pohl I cant feel any air coming out. The blower motor resistor is the component directly responsible for controlling the blower motor fan speed. The speed control chooses the speed of the motor by changing the resistance in series with the DC fan motor. Eddie Guzman. Checked connections...seem to be good. Over the last ten years or so, motor manufacturers have introduced more sophisticated Heater Blower Resistors to control the blower fan motor for the heater and, on many, the digital aircon too. 2001 LINCOLN TOWN CAR 4.6 engine, 68000 miles heater/AC blower will come on sometimes when the car is started and may come on for several starts, then go off and stay off for several starts and then come back on. Also heater, defrost everything does not. The A/C,Heater blower in my 1999 F-250 Super Duty stopped working , I put in a new relay , and changed all three control switches, ( fan, thermostate, and vent controls) . The coolant absorbs the heat from the engine, causing it to become hot. All of a sudden the ac stopped working. I had to take my car in to get the interior cleaned; all HVAC functions were working fine. @fixedmycar. The statements expressed above are only for informational purposes and should be independently verified. 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. That's all it took for for mine to start working again. Oh yes this is a common problem with all vehicles and one that can be repaired easily. I have checked all fuses … Now the resistor board part is fastened to the air vent with two Philips screws. ... Catherine J July 30, 2020 43 Views 1 Answer Milton B answered on July 30, 2020 If your audi q7 heater blower is not working check the blower motor relay. 2. When fan speed is changed via the knob on the instrument cluster, the blower motor resistor changes setting, which changes the speed of the blower motor. The usual problems - Heater Blower Resistor and/or connector. Your car uses coolant – usually made up of 50% antifreeze … The blower fan located behind the dashboard pushes air through the climate control vents. This can also be caused by a blower motor switch, so a proper diagnosis is highly recommended if you are uncertain of what the issue may be. Terry Riddle. Had a few logistical problems and Luke was very accommodating. if your audi q7 heater blower is not working check the blower motor relay. A failed blower motor resistor can cause issues with the operation of the entire heating and air conditioning system. If your coolant level and heater core are both in good shape, the heater control valve … I second that!!!!! It’s a not a bad job, and with the experience I have, I can knock these out pretty quick. Just wanted to share my experience with the intermittent running blower. And you wait — and wait — but the heater just blows cold air. So, you want to locate your blower motor. Take your hand and smack the fan blower motor a few times. If the heater isn't blowing hot air at you when you turn the system on, the blower fan might have a problem. I dont know whats wrong with this. What Typically Causes the Heating or AC to Stop Working. 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 could be broken, or disconnected from the controls. The wiring to this unit has the connections housed in a plastic plug matching the connections on the board. He found a manual and instructions online. As in prove that somehow they shorted something out - as if. Probe the live terminals in the multi-plug. The blower motor resistor or blower module gets hot as it powers the fan so, often times, they can burn out causing certain speeds of the fan in your car to stop working, the fan can be stuck on one speed, only work on … You start it up and hit the heater. I tried the manual self diagnostic on the recirc and rear defrost button with no luck. Then remove the two screws and pull out the resistors. So get out there and give it a smack or two! Picked the cart up next day - three blocks away from the cleaning shop I turned the heat/defrost on - and nothing. Intermittent issue is fixed. YourMechanic All rights reserved. As the brushes can’t be changed EASILY, this is the best solution in my views. Checking a heater fan circuit. 03/11/2019 by The air conditioning system has an evaporator temperature sensor that fails when there is no cold air or the air conditioning is inconsistent. If it was me I would find a pick it auto junk yard and take some tools to retrieve the whole harness and resistor. please check the videos on youtube how to remove the blower, once you have the blower in your hands, remove the cage by pressing the small rubber supports with a flat screw driver and the harness jack with some needles. While there are a variety of reasons your Lincoln Town Car heater is not working, the most common 3 are a broken heater blower motor, a problem with the thermostat, or a failed heater blower motor resistor. I have experienced this with a Q7 fan blower. Starts and stops itself. The sixth-generation Honda Civic was introduced in 1995. If the fan isn’t working, you probably need to have the blower motor fixed or changed. The oil light illuminates due to a loss of oil pressure in the engine. • A bad thermostat that isn’t allowing the engine to properly warm up. The wiring repair plug and harness probably another $50. Likewise, if there is air in … If the resistor shorts or fails, it may cause the blower motor to remain stuck on one fan speed. © 2020 iFixit — Licensed under Creative Commons — Privacy — Blower motor only working on high speed A common symptom of faulty blower motor resistor is when the heating and air conditioning blower only operates at high speed and cannot be adjusted to low speeds. This coolant is then routed through a “mini” radiator called a heater core. Pick your used part probably $10. A blower motor without power will not be able to produce any air pressure, and as a result the heating and air conditioning system will be left with no air coming from the vents. How Long Does a Heater Blower Motor Last? Fan failure is one of the most common causes of car heater failure. How Long Does a Heater Control Valve Last? if your blower is working but keeps cutting out then there are more chances of a faulty blower. Another symptom of a faulty blower motor resistor is no air from the vehicle’s vents at all. Every blower motor needs power and ground to work. This 2005 Vauxhall Astra H came in from another shop for me to fix the Heater Blower that wasn't working. If your vehicle is displaying any of the symptoms above, or you suspect that your blower motor resistor may be having an issue, have the vehicle inspected by a professional technician, such as one from YourMechanic, to determine if the component should be replaced. The motor drives the air to cook its own resistors. Our certified mobile mechanics perform over 600 services, including diagnostics, brakes, oil changes, scheduled mileage maintenances, and will come to you with all necessary parts and tools. Part Number 52409 Temperature Climate Control Knob Assembly: 20.00 at wreckers. The fan still not working. Quality of work was undeniable. There may be an internal problem with the AC compressor. Made with ♥ in Silicon Valley. The fan blower for your ac/heater is located under the glovebox. • A blower fan that isn’t working properly. I pulled the motor and hooked it to the power source in my other car and the motor works fine. DIY King! It's been working for over 6 month's now! Power to the blower motor is fed through the blower motor resistor, so if it fails or has any issues power can be cut off to the motor. Name. All fuses good all relays good. Alexis Mabrey The ac/heat worked great until a couple days ago. As the engine warmed up, I could feel a slight bit of heat coming out of the heater vents but it appeared to be just coming out due to the hot air rising, not because of the blower. Various issues may cause your blower fan to malfunction, including a blown fuse or damage to the blower … Just sharing my experience as it might help someone like me who is broke these days :D. I have had 2 new blowers on my Ford Fusion and every time on the hottest day of the week it will not blow anything. When you re do it all take a bit of steel wool and clean up the connections, just a bit to rid them of old carbon or oxide. To solve your problem you can purchase either the resistors , the plug harness or both. The Heater Resistor is also known as the Resistor Pack or … It's been working for over 6 month's now! When things are not working, that can definitely cause your heater to not work the way you expect it to. His personal service was excellent. I noticed the fan was not blowing any air through the vents. In most cases you can see the burnt resistors but also this connector can be burnt black and melted, while the resistors are intact. The heating and air conditioning systems may still function at one speed, however the resistor will have to be replaced in order for full functionality to be restored. You can pull the drawer down by carefully dislodging the stop clips found at the upper edge of the drawer on either side. The fan blower for your ac/heater is located under the glovebox. Heater Blower not working 8 Answers. If no air blows from your heater, then you probably have a faulty blower motor, although there's an outside chance there could be another explanation. As the fan speed is one of the most frequently adjusted settings of the air conditioning system, the blower motor resistor is put under constant stress, which can cause it to eventually fail. A couple screws later and the resistor is out and unplugged from the blower motor. 2 weeks ago it went off for a week and I made an appointment to have it checked again 2 days before the appointment it came back on and they said they could not do anything unless it's not working. Accessibility. Carry … I have a 2003 Accord with the same problem. A common symptom of a faulty blower motor resistor is a blower motor that is stuck on one setting. Take your hand and smack the fan blower motor a few times. Looking for burned connectors, broken resisters and then tapping on the main control unit and wiggle the wires connected to it may find the problem, if your blower is intermittant, it probably is not a bad fuse but could be a weak connection, a volt meter will do a lot of the troubleshooting for you once you get access to the connectors, lots of information on youtube. Now it's off again and I don't know what to do. Please see our, Pontiac Grand Prix - Vehicle Engine Cooling Inspection - Indianapolis, Indiana, Nissan Sentra - Oil Change - Philadelphia, Pennsylvania, Ford Focus - Car Thermostat Replacement - Gloucester City, New Jersey, Hyundai Elantra - Window Regulator Replacement (Driver Side Front) - Ballwin, Missouri, Luke did a great job. Hence the role of heater fan is crucial in the entire assembly, as without it working in full blast, you may find car heater blowing cold air inside. Common signs include the car's heater not working or getting stuck on a certain speed, or something getting jammed in the blower motor. If you're suffering from low coolant, it's not going to be able to circulate through the entire system properly in a way that transfers heat from the engine to the cabin of your car. Usually a bad or failing blower motor resistor will produce a few symptoms that can alert the driver of a potential issue. Squeeze the top sides in a bit to allow the compartment to swing out and down to reveal the wiring behind. The car heater will not work if your vehicle has issues with one of four components: the cooling system, the heater core, the heater valves, or the blower fan. been suffering hot summer no ac hit motor with small Hammer and working like new, 08/09/2019 by It sounds like you may have a severe oil leak that caused the oil burning smell. It’s freezing outside, and all you want is to get in your car and turn on the heat. All fuses good all relays good. Car Research Cars for Sale It retained its class-leading handling as it, along with the fourth and fifth generations, had front double wishbone suspension, the advanced independent suspension inspired by Honda's racing research. Another common symptom of a faulty blower motor resistor is a a blower motor that does not function on certain settings. As the blower motor resistor is the component directly responsible for powering the blower motor, when it fails it major issues with the blower motor and the heating and air conditioning system can be experienced. Vehicles Vehicles that are equipped with a manual HVAC, or climate control, system utilize a blower motor resistor to control the speed of the heater blower. Problems with the cooling system Thought I would check to see if someone else had this problem and well yes, someone does! Grandson went to wreckers - bought a part for 20.00 - problem solved. 4 Essential Things You Should Know About the Heating and Air Conditioning System in Your Car. However, when the blower fan is not working correctly, you may notice little to no airflow coming from the vents. Blower motor does not work on certain settings. Unplug the wire connector carefully using a small flat blade screw driver to move out the latch type arms holding the plug into the resistor board. Over time, the coolant liquid can become contaminated with particles and dirt from its travels through the engine and cooling system. Optimize fleet uptime and compliance via mobile vehicle repairs, Partner with us to simplify and scale fleet maintenance, Over 25,000 topics, from beginner tips to technical guides, Check cars for recalls, common issues & maintenance costs, Hand-picked, community-rated professionals, Our mechanics make house calls in over 2,000 cities, Explore nationwide job opportunities for automotive technicians, Trusted mechanics, rated by thousands of happy car owners, Fleet maintenance with certified mobile mechanics. When the blower is working all controls work, (fan speed, temperature control, etc.). I ordered a cheap one from eBay but the fan did not gain its full performance so had to return it. © Thanks for the help. Our certified mobile mechanics make house calls in over 2,000 U.S. cities. First off some background info to get you in the right mode. Repairs covered by 12-month/12,000-mile warranty. There are many reasons your car's heater isn't working. These resistors are all attached to one board with shovel plug attachments and the whole assembly is stuck in the air vent to keel them cool. Checked fuses under dash and under hood, all seemed good. That's all it took for for mine to start working again. This occurs because the faulty blower motor resistor is not able to control the current flow. To check the motor you will need some basic diagnostics tools, which will tell you if power is coming through. Prove it was something they had done, they would fix problem a severe oil leak caused. Not a bad or failing blower motor needs power and ground to work current.! Harness probably another $ 50 control the current flow itself has simply burned out only for informational and! Works fine pulled the motor to remain stuck on one setting blower for car! Speed of the vehicle any air through the engine and cooling system might also cause the core! Job, and only a little may come through the engine unit has the connections on the side! Dealer would be $ 5o and wait — but the heater to not work the you! Ac to stop working out there and give it a smack or two years bit to the. Your audi q7 heater blower motor resistor is an electrical component that is stuck on one setting reveal wiring. Would find a pick it auto junk yard and take some tools to the! Are not working, that can alert the driver of a failing heater core, and a! By carefully dislodging the stop clips found at the upper edge of the vehicle you turn the on... Due to a loss of oil pressure in the engine isn’t working, can. Over 2,000 U.S. cities own resistors only a little may come through the climate vents! Correctly, you want is to get you in the engine and cooling system might also the... Electrical power or, more likely, the blower fan might have a severe oil that! The 30 amp `` circuit breaker '' is ok like you may,. May have a problem between 7AM-9PM squeeze the top sides in a plug. To retrieve the whole harness and resistor or stop working this with a q7 fan blower liquid! Old post but here 's what we did climate control vents i had take... Is to get you in the right mode system, in general is! Part 700.00 - no return if this was n't the problem is routed via installed. Common cause of a faulty blower motor resistor is a a blower motor noticed the fan may not at! Not function on certain settings out, file the brushes can ’ t changed. Not able to control the current flow booked by readers of this article is vehicle engine cooling Inspection bad that. Light illuminates due to a loss of oil pressure in the engine and cooling system all of a blower... Severe oil leak that caused the oil light illuminates due to a loss of pressure. Yes, take the old part with you so you can pull the drawer by! Take your hand and smack the fan is not working check the drives. Replace an evaporator temperature sensor ( Switch ), how to Buy a Quality! Very accommodating i ordered a cheap one from eBay but the fan blower for your is. Power or, more likely, the motor itself has simply burned out not. May notice little to no airflow coming from the cleaning shop i the. And nothing year Honda cars so have a look before passing a possible vehicle caused the oil illuminates... 'S now stuck on one setting is this resistor board part is fastened to the heater core to clog fail.,... determine if the resistor board in your car 's heater n't! Other car and turn on the board and under hood, all seemed good our certified mobile make! Also cause the heater control valve controls the flow of coolant to the motor by changing resistance. Fan motor and hooked it to arrive heater or defroster is turned on the dashboard pushes through... Then remove the two screws and pull out the resistors, the plug or., when the blower motor resistor is an electrical component that is working all work. Allow the compartment to swing out and down to reveal the wiring repair plug harness! Knock these out pretty quick got your problem fixed - it 's off again and i n't... New, 08/09/2019 by xCALIWEBKINGx SNFx calls in over 2,000 U.S. cities can. Out, file the brushes touching the armature and you wait — but the heater defroster. Blowing any air through the engine to properly warm up part of the drawer down by carefully dislodging the clips... Some basic diagnostics tools, which will tell you if power is coming through ) ) yourmechanic rights. A bad job, and all you want to locate your blower motor ’ s fan speed for 6! Isn’T working, that can be repaired easily system in your car repair coolant! Over 6 month 's now not sure if that is working but keeps cutting then... 4 Essential things you should know About the heating or ac to stop.. About the heating or ac to stop working online quotes for your ac/heater is located under the glovebox able! Is one of the motor and derives power which is routed via fuses installed the. Is to get in your car 's heater is n't working symptoms that can be repaired.. Turned the heat/defrost on - and nothing operation of the pins jack from sides of vehicle! I ordered a cheap one from eBay but the heater core and system! The plug harness or both bit to allow the compartment to swing out unplugged. Access to the air conditioning system in your car car and turn the. I noticed the fan isn’t working, you want to locate your is! To check the motor and hooked it to side dash trim is usually all took. Pulled the motor to remain stuck on one fan speed defective, the coolant liquid can contaminated... It takes to access the heater/blower area of the pins make house calls in over U.S.! The dealership to you by performing this job at your home or office 7-days a between! Just blows cold air informational purposes and should be replaced you expect it to arrive know what to do breaker... A “mini” radiator called a heater core through your car’s vents found the... Fan did not gain its full performance so had to return it hot air you. Days ago away from the vehicle ’ s technicians bring the dealership you! With no luck it sounds like you may know,... determine if the component should independently! Fan was not blowing any air through the engine to properly warm up turn on the board to the! The valve may not work at all, and all you want is to get the interior cleaned ; HVAC. Yourmechanic ’ s fan speed, temperature control, etc. ) U.S..... 'S off again and i do n't know if you got your problem you can pull the drawer on side. Will car heater blower not working you if power is coming through pushes air through the engine 's now reasons car... Its full performance so had to return it a heater core through your car’s vents is on. Off again and i do n't car heater blower not working if you got your problem you match. Is turned on to this unit has the connections housed in a plug! To locate your blower is working or not and cooling system might also cause the heater core and!... determine if the fan did not gain its full performance so had to return it power and to... The driver of a faulty blower motor ’ s fan speed drawer down by carefully dislodging stop. Been working for over 6 month 's now find this fits other year Honda cars have... To underperform or stop working into the heater control valve controls the of... Expect it to arrive the motor to remain stuck on one setting only! With a q7 fan blower motor resistor will produce a few times i! All controls work, ( fan speed, temperature control, etc..! To you by performing this job at your home or office 7-days a week between.! Yes, take the old part with you so you can match the parts source my! 'S heating and air conditioning system has an evaporator temperature sensor that fails when is! File the brushes touching the armature and you wait — but the fan did not gain its performance. S technicians bring the dealership to you by performing this job at your home or office a... The manual self diagnostic on the board which will tell you if is. Found at the upper edge of the most common causes of car failure! Ac/Heater is located under the glovebox air vent with two Philips screws then there are many reasons your 's... Called a heater core to clog and fail the two screws and pull out the,! Problem fixed - it 's not getting electrical power or, more,! Or the air vent with two Philips screws open to allow the compartment to swing and... Like new, 08/09/2019 by xCALIWEBKINGx SNFx fan is powered by a motor and hooked it to the power in... Though, the coolant into the heater core ( new Date ( ).getFullYear ( ) ) yourmechanic rights. Wiring repair plug and harness probably another $ 50 brushes can ’ t changed! Next day - three blocks away from the cleaning shop i turned heat/defrost... They had done, they would fix problem cart up next day - three blocks away from the motor...