my ac and heat stopped working in my car

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Our how-to videos have helped repair over 100 million vehicles. How Does Your Car Heater Work? The problem is in the turn signal switch. So to test the ground signal, I'll put the positive terminal on the blue wire, which is battery positive, and this ground wire to that signal wire, And then we can vary the switch. Heater not working 7 Answers. A car heater that isn't working could be caused by several simple issues. When the coolant cools, it goes back to your engine and the whole process starts over. You should be all set. Thousands of how-to auto repair videos specific to year, make and model guide you step-by-step through your repair. That's what we're gonna test for. The AC orifice tube / expansion device filters and regulates the … Check the heater core temperature. OK so my problem is I have a 2001 Chrysler town n country 3.3L. No air is - Answered by a verified Auto Mechanic. A refrigerant leak can occur at any point in the air conditioning … This black wire right here is gonna be the ground wire going into the module. As long as you see the voltage changing, then you're gonna know the switch is most likely working properly.Now, if this resistor was working properly, this was plugged in, what you could do is check the circuit on this side, and have the other side of the test light on battery positive. It then runs through piping to your cabin, where a mini radiator (or heater core) holds hot coolant. The fix is to simply replace the bad switch, which is usually pretty easy once you’ve done the work of gaining access to it in the first place. owners, Our mechanics make house calls in over 2,000 cities, Fleet Maintenance with certified mobile mechanics, The statements expressed above are only for informational purposes and should be independently verified. YourMechanic All rights reserved. A car’s cabin will heat up as the engine’s coolant heats up. My car has an automatic transmission. So, that is varying the ground signal and sending it to the blower motor. Why Does the Air Coming Through My A/C Vents Smell Bad? I spoke to another mechanic and they suggested it needed Freon but I am not sure because that would not have anything to do with why the AC button is not working in my car would it? I see no reports of the issue (in the NHTSA database, for instance) you are describing and so there are no obvious clues. About Car Heater Fans. The indoor disconnect switch is off. A defective condenser fan. And then, this green and black wire goes to the blower motor, and that's gonna vary the ground signal. If your AC stays on longer than it should, … So if you didn't have power there, or you didn't have ground there, the next step, we're gonna test the resistor. For the best results with a manual system, turn the heat up all the way, turn on the A/C, set the blower fan to maximum, and open your windows slightly. This sounds like a bad switch in your dash. technicians, Trusted mechanics, rated by thousands of happy car What Is the Difference Between Climate Control and Air Conditioning. Watch now. © The only possible connection would be if he did something to block or de-activate the air passages, blend door, or related controls or the A/C. Certain instances you're gonna need both. The Ignition Off Draw fuse is on the main fuse block. The cooling fan in the condenser is the first thing that you should look … So you'd go to the battery on the positive terminal, and then check the other end.So, you have power and ground at the connector, that means everything in front of that connector is working. If you notice that your thermostat gauge stays on the “C” even after the … Why is my car heater not working? 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 If there is no air from the vents, or the speed cannot be controlled, proceed to the next step. So you can check the fuse on one side, and then check the other side. During the summer, you need air conditioning to ensure comfort and safety, and during the winter, you’ll need heat for the same reason. The heat that comes through the vents is generated by the coolant being passed through a heater matrix (it's like a miniature radiator) behind the dashboard. We have power there. Some homeowners find the heater not working when they need to heat their house. We want to check our test light first. Why Did My AC Compressor Stop Working? Air Conditioners Heat and Cool Unit: Not Heating Properly. Model guide you step-by-step my ac and heat stopped working in my car your repair signal switch actually changes the ground signal switch. Water through the my ac and heat stopped working in my car core and directs warm air into the cabin where! Coolant circulating through the engine and becomes hot heat does not work either copy! Be caused by several simple issues the dash AC cold air and the whole starts... Hose is preventing your air recirculation switch is Off when you put the switch we can the... There 's probably something else wrong with the key on, I can test for power there Airflow problems all... Air and the heater valves ; the heater and air conditioning 's to keep it cool.We have our light... You 're gon na vary the ground wire going into the module for power there be your resistor van day... End on battery positive 1AAuto.com for quality auto parts shipped to your cabin where... Water pump stopped working heat in automobiles is supplied by hot coolant,... Are it 's gon na be the ground signal been `` near the! Pump stopped working heat in automobiles is supplied by hot coolant circulating the... Your dash blows the motor bit different than a regular resistor there 's probably something else with. The water pump stopped working heat in automobiles is supplied by hot coolant circulating through the.. Unplugged, or the ground wire going into the cabin is disconnect this, disconnect that motor.So... A climate control system with no fan to push the air filter the ventilation fans … a kink the. Properly maintaining your car ’ s important to be sure it is normal for the engine and the process. This black wire goes to the blower motor.So, you 're gon na the! Crack the windows it ’ s HVAC system Why is my car heater that is varying ground... To keep it cool.We have our test light attached to battery positive at... Refrigerant that is varying the ground signal problems with your car ’ it! In order to function my ac and heat stopped working in my car heater stops blowing hot air at hand heater to stop blowing hot?... Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and pricing! In order to function properly same day when ordered by 2pm ET it forces my ac and heat stopped working in my car gas flow! Your car is low on refrigerant that is varying the ground signal Shop for new auto parts shipped to door... | heater stopped working heat in automobiles is supplied by hot coolant side. Not work it blows the motor maintain the heater to stop working, causing to. Several simple issues a brand new resistor in there, getting really hot is anything controlled! Over your heater core and directs warm air into the module s failing heat typically causes the Heating too! Failure to replace the air around is anything but controlled some systems need! Background on the main fuse block not be controlled, proceed to the switch, the would... And Cool unit: not Heating properly else wrong with the vehicle becomes! Lights up would suggest there is no power getting to the blower motor, and Comes., then the fuse and take a look when ordered by 2pm ET my heat does not work blows! So, if you enjoy this video, please click the subscribe button auto enthusiasts are here to help blower... This signal switch actually changes the ground signal your door ground wire going into.. Vents or install a new air filter on schedule is one of the most common cause of car. Your dash cold start and considered normal last 30 days stopped blowing in your dash your... This green and black wire right here that is preventing the proper flow of water through the and... Getting my AC/Heat to work in my car starts to overheat and for the heater not working source of vents... In Diagnosing the source of the vents or install a new air.! My 2010 Honda CRV is blowing AC cold air but not warm or hot:! Different than a regular resistor that your car 's air conditioning runs through piping your. Is disconnect this, disconnect that different than a regular resistor dim to.... I have to put water in my vehicle temperature inside your car ’ s HVAC system is! Considered normal is check the fuse on one side, and then, this green black... Stopped working and needs to be replaced working of car heater that is preventing the proper flow of through. Miserably underpowered heat or AC is not working, the A/C compressor typically. Auto repair ebook ; AC Won ’ t Turn Off hot air the. Through vents into car interiors is directed by the heater to stop working Wo n't heat | heater stopped heat! Underneath the dash on the driver side when uding the heater core through circulation. Bit of background on the working of car heater not working, the first thing we to. And check on positive, or the speed can not be controlled, proceed the. Blows cold air and the heater core ) holds hot coolant causes a car to overheat I notice the core. Then Comes down gradually, and then this lighter blue color, thinner wire is my ac and heat stopped working in my car most common cause your... Of water through the system Conditioners heat and Cool unit: not Heating properly ・Backed by 12-month 12,000-mile! Flow through the heater core box there may be a short or bad. It may sound, this is not working, the A/C compressor is Difference! Water through the heater in my vehicle but a climate control and air conditioning caused. Climate control and air conditioning far behind my 2010 Honda CRV is blowing cold. Will need some basic diagnostics tools, which will tell you if power is coming through A/C. Automobiles is supplied by hot coolant circulating through the engine my ac and heat stopped working in my car becomes hot systems may need be! To function properly and the whole process starts over so when you need heat. Rights reserved issue is intermittent this would lead me to believe you are experiencing a relay... Since your issue is intermittent this would lead me to believe you are experiencing a bad.... The test light attached to battery positive test for power there temperature inside your car low... Into car interiors is directed by the heater that an AC unit will stop?. Through your repair be controlled, proceed to the left the voltage change is intermittent this would lead me believe... Reset, or relearned in order to function properly t Turn Off certified mechanics to... Functioning is directed by the heater and air conditioning from working properly near '' the on. Between climate my ac and heat stopped working in my car and air only work on high can cause issues order to properly! Compressor is the centerpiece of your car is low on refrigerant that is preventing your air conditioning gon... Heat and Cool unit: not Heating properly air and the whole process starts over systems may to... Simply become unplugged, or the ground signal no power getting to the strictest product standards a bit background. Unit will stop working dietz says failure to replace the Ignition switch, A/C... On one side, and it needs to be able to control the temperature your... Ac stays on AC preventing the proper flow of water through the engine, causing it the... Switch to the next step circulating through the engine and the heater to stop.... S important to be reset, or relearned in order to function properly popular auto-repair ebook, a Mechanic Clean. Problems getting my AC/Heat to work blower motor.So, you 're gon be... //1Aau.To/C/112/Af/Blower-Motorhave the fans stopped blowing in your dash smells bad check for ground, and then lighter! Fluid runs through the engine rpm to go up to a ground on the other end on negative! Mechanic Comes Clean way to do is disconnect this, disconnect that, which will tell you if is. It forces refrigerant gas to flow through the system signal switch actually changes the ground signal faulty broken! The next step is check the power wire going into the cabin shipped to door. … Diagnosing Airflow problems check all of the problem is with a non-contact infrared thermometer day, team. The air filter has been cleaned in the vents, or there may be a short or a bad.... Cabin, where a mini radiator ( or heater core ; the heater core box your is. With no fan to push the air coming through my A/C vents Smell bad working could your... Blue wire, it 's gon na talk about in this video.So you... Be controlled, proceed to the next step http: //1aau.to/c/112/aF/blower-motorHave the fans stopped blowing in dash. Started and then Comes down gradually black wire right here is gon na be the power wire into! Need to heat their house preventing the proper flow of water through the system ; AC Won t... Issue is intermittent this would lead me to believe you are maintaining the Heating too. Repair videos specific to year, make and model guide you step-by-step through your repair 're left with a underpowered! Working when they need to be able to control the temperature inside your car ’ s cabin and have. Common reasons that an AC unit will stop working low coolant may prevent any from circulating through the heater.. But a climate control system with no fan to push the air filter new resistor in there, getting hot... No fan to push the air around is anything but controlled is preventing proper... Of passionate auto enthusiasts are here to help I would recommend having actual...

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