ISO Certified
UL Approved

I didn't know this. ... 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. This allows hot coolant to enter the heater core when the heat is commanded to operate.If this valve has failed then two things can happen,either the heater will always be on all the time or the heater will not work at all (this is the most common). To diagnose why the air conditioning in your car isn't working, start by turning your car on and setting the AC to full blast. Last Updated: October 22, 2020 By using this service, some information may be shared with YouTube. Thanks! wikiHow is where trusted research and expert knowledge come together. I have a 2002 Camry 2.4L 4 cyl. A blower motor may have a resistor problem if your air only blows on the high setting but will not blow on a lower setting. Look for oily residue on or around hoses that attach AC components together. Do you have any question about your car problem, or maybe you want to know about specific parts of your car? A loud noise (or bad smell) coming when the heat or air are running could be a sign of this problem. If there is no coolant it can’t work… 2003 Nissan Altimaair Conditoner Is Not Working, Question: 2003 Nissan Altimaair Conditoner Is Not Working, took first compressor off repalced it with new one it labored a few times and commenced blowing HOTT air set dye, Whats The Avg Milage To Replace A 1996 Dodge Intrepid Automatic Transmission And Airconditioning 110000, Question: Whats The Avg Milage To Replace A 1996 Dodge Intrepid Automatic Transmission And Airconditioning 110,000, I have 110,000 miles (three.5 liter) and I just acquired it but it, Car Repair Manuals and Tips on Common Car Problems. ", "I am able to check the compressor myself before a mechanic tells me everything that is wrong and not wrong. Wear long sleeves and gloves whenever possible. I'm have a radiator leak on top, but I don't know if it's cracked. ", "The air filter was most important to me, thanks a million! It only blows hot air on 3 and 4. If it is not spinning, you have a problem with your compressor. ", "Good knowledge for diagnosing problems. Include your email address to get a message when this question is answered. Check coolant levels by inspecting: there should be sticker diagram there so you’ll find which is which. By using our site, you agree to our. The heat worked in the entire car. Can u please tell me what the problem of s. My car does not over heat. Therefore, it is possible that your car is low on refrigerant that is preventing your air conditioning from working properly. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. Important Tip: If your car heater stops working, schedule an appointment to have us check it out. There are many reasons your car's heater isn't working. Wear safety glasses and work in an open environment, where fumes won’t overwhelm you. There could be a problem with your blower motor. ". I checked for leaks, and it doesn't have any. About Car Heater Fans. Hey! "It was all good information on how to check a car's air conditioner when it is not working before taking it to, "it gave me initial information to find out why the a/c is working only intermittently on my '95 Camry. ", "The step by step information made it easy to find problem. Online auto repair questions, problems and troubleshooting. Your air conditioning system uses a refrigerant, a compressor, an expansion valve and two heat exchangers to manage air flow and cool the air inside the cabin of your vehicle. ", "Good step by step, easy to understand guide! Checked for battery at the blower, when the car is running. By signing up you are agreeing to receive emails according to our privacy policy. Checked the blower with direct power and it works. Now I'm enjoying my AC. I can't do, "My 2009 Honda Civic AC stopped working when the outside temperature was around 92F and then I went online on, "I am currently buying a car with AC problems, and was just interested to learn more about what to look for. To learn other issues that might be causing your car's AC to not work properly, keep reading. Call the utility company to see if there is a problem with your account or if there is an outage in the … There are a number of different underlying causes that can lead to these situations where a car heater suddenly stops working, but you’re typically going to be dealing with either one or the other. There are also some testers that use dye, UV light, and protective glasses to find leaks. I go to use my heat and it is carrying out the same point my air is performing! A car heater that isn't working could be caused by several simple issues. ", "That there was a cabin air filter in the vehicle helped. Best answer for Why Does My Air And Heat In My Car Only Work Sometimes. I have a 2005 G6, and the AC button will only light up when the vent circulating button is on. This article has 23 testimonials from our readers, earning it our reader-approved status. Courtney Says, “My 2003 Buick Century heater works fine while accelerating but as soon as I release the gas the air begins to cool, swiftly.” Not enough information is leading to guesses. What do I do if I replaced my motor in my vehicle and the AC doesn't work? I feel we need some clarification from Courtney. So, a problem with the vehicle's cooling system might also cause the heater to underperform or stop working. Heat generated through engine functioning is directed towards the heater core through coolant circulation. What do I do if my A/C isn't blowing air? The air labored wonderful for a few months and now it only works at times. Check the associated fuse/relay, and then diagnose the motor itself via physical inspection. What do I do if the air in the vents is coming out hot when the AC is on? If it doesn’t, try searching online for “replace cabin air filter” followed by the year, make, and model of your car (for example, you might search for “replace cabin air filter for 2006 Toyota Camry”). It made it so nice, and I could understand it way easier. I've put coolant in it, and it works for a few seconds, then stops. 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. Your car’s heating and cooling system uses the coolant to move heat from the engine into your car’s heater core. We use cookies to make wikiHow great. How do I diagnose a 2008 Crown Victoria police model with no air conditioner or heat? Thanks to all authors for creating a page that has been read 1,398,749 times. Collecting Initial Information Turn the air conditioning on while the car is running. The AC air blows cool air while driving, but in stop-and-go traffic it will blow warm air. Unfortunately, mice and other rodents sometimes build homes in car HVAC hoses and can get caught in the blower motor when the car is started. What do I do if my air flow drops down in my vehicle after it's been running for a while? 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. Oily spots may indicate a refrigerant leak. ", "Suggestion about the AC compressor clutch helped, thank you. ", "When I go to have my AC checked, I will have a lot more info. Can I adjust my air conditioner thermostat level with the diagnostic software? A recharge will only fix your system if the charge was low. Car Heater Blowing Cold Air: Low Coolant Level Counterintuitively, the same system that keeps your engine cool is responsible for the heater working. s.rose on September 18, 2016: Dysfunctional Thermostat. Very helpful to those not familiar with mechanics! Either the blower isn't working, in which case you may get warm air but not much of it, or it is blowing air but it may not be very hot. I've replaced the switch in the dash,… My 91 Chevy Astro doesn’t like to blow air on high. A lack of heat can be a symptom of a much larger problem. To learn other issues that might be causing your car's AC to not work properly, keep reading. I have an interest in, "I love it. Faulty Heater Fan. The car AC pumps cool air at an RPM of 1500+, so in order to get the cooling, you need to maintain an RPM of 1500+. My 2005 Toyota Matrix X-rays. While both the heating and AC are connected - to an extent - within your car, they’re actually separate systems. Then this blog is for you, we have tried to collect as many as possible about automotive and accessories related topics. You are also less likely to be taken advantage of at a repair shop if you already know why your AC is not working. ", How to Diagnose a Non Working Air Conditioning in a Car, http://www.agcoauto.com/content/news/p2_articleid/256, http://www.motor.com/article.asp?article_ID=1874, http://www.firestonecompleteautocare.com/cf/maintenance/car-air-conditioning-repair-troubleshooting/, http://www.youfixcars.com/blower-motor.html, https://www.youtube.com/watch?v=PMM80xlon3U, http://www.agcoauto.com/content/news/p2_articleid/258, http://www.youfixcars.com/automotive-air-conditioning-safety.html, diagnosticar un aire acondicionado de automóvil descompuesto, Diagnosticare il Problema del Condizionatore non Funzionante dell'Auto, диагностировать неисправность автомобильного кондиционера, diagnostiquer une climatisation qui ne fonctionne pas, Eine defekte Klimaanlage im Auto diagnostizieren, Mendiagnosis Penyejuk Udara Mobil yang Tidak Berfungsi, Achterhalen waarom de airco van je auto niet werkt, Tìm nguyên nhân máy điều hòa ô tô không hoạt động, अपनी कार के एयर कंडीशन के नहीं काम करने की वजह पता करें, Arabanın Kliması Çalışmıyorsa Hata Tespiti Nasıl Yapılır, consider supporting our work with a contribution to wikiHow. Turning the system off for a while and letting it thaw will temporarily solve the problem. A fan blows over this heater core and the warmed air enters the cabin. The first thing to be affected will be the heater core — since it is higher than the engine, there might not be enough coolant to reach it. Got Climate control? Solution: This can be as simple as a blown fuse, or it could be more involved. Learn more... Driving around on a hot day in a car without a working air conditioner can be uncomfortable and even dangerous in extreme heat. If not, you could have a bad compressor or fuse; check the fuse first. I am hoping someone can shed some light on my issue. Which prior to my warmth worked great. There could even be a puddle of liquid under the front of the vehicle. I was thinking it had to do with maybe the control, when you turn it back and fourth, but I don't know. Diagnosing the reason that your air conditioning isn’t working will help you determine whether the problem is one that you can fix yourself or if you need to take it to a repair shop. Electrical issues are perhaps the most difficult problem to diagnose when it comes … Even if you’re missing a little coolant from the system, the engine can still run at the correct operating temperature. Thank you. The wheel (which is the compressor clutch) should be spinning. What could be wrong? What can I try next? The heater, however, is a different story. This way I can check it myself and at least get an idea of what's wrong. ", wikiHow and I found the solution. When I turn my a/c on it blows hot air and the fans don’t run. wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. When a car heater doesn't work, the most common cause is low coolant. Properly last month the weather acquired cold out so I necessary my heat. Then just out of the blue, the front heat doesn't work and the back heat DOES work. You may consider using an electronic leak detector, which can detect much smaller quantities of refrigerant. Other than that, the AC system could care less what the engine is doing. Reasons Why a Car Heater Stops Working There are a few reasons why a car heater may be on the fritz—it depends on the nature of the problem. 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. ", "Good explanations. It is possible that your cabin air filter is so blocked that it is interfering with your air pressure, and replacing it will be a relatively easy an inexpensive fix to your problem. I have a 1994 Honda Accord and the ac in my car does not work. Check the fuses under the hood, and check under your glove compartment for a cylinder shaped motor. But today the heat seemed to stop working all together. Ac/heat blower fan not working, randomly turns on and off. 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. fuses usually is under the steering wheel You will probably need new parts too, as many of the components cannot be repaired or patched. Either coolant isn’t flowing through your heater core, or air from the blower motor isn’t being directed through your heater core. Thanks! First, Replace the Blower Motor Resistor (easy fix, this part is likely located under the glove compartment of your vehicle). One common failure that can cause this here is the heater/water shutoff valve/solenoid. 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 changing the selected vent does not alter the flow of air, you likely have a blend door problem, which will require replacing the doors inside the dash that determine the direction of the air flow. This is entirely normal, especially in humid environments. Therefore, the AC should always be on in most cars (even in the winter). I got it checked, the a/c worked, blew cold air, and the fans worked for 1 day and then the next day it was blowing hot air and the fans stopped working. My car is Renault 2015,now I am in in journey,my ac is not working ,and even not blowing air also what to do,is there any emergency solution for this.or ,what to check if to know the problem is ? That’s small radiator sort of thingy hidden behind the engine. % of people told us that this article helped them. • A bad thermostat that isn’t allowing the engine to properly warm up. Then, recover the Freon, vacuum the system, check for leaks, and recharge the system. If so, your ambient temp sensor is malfunctioning. Take it to an AC specialist and tell hm that. If the engine is overheating or low on coolant the air conditioner will be weak or not work at all. FYI Without modification or a different mode switch the compressor will not run in Defrost mode. Thank you. I put on a new upper hose; that's, "I really appreciated the easy terminology that was used. How a car’s cooling system works. If the problem is persistent, you may need your system to be flushed or evacuated with a vacuum pump. wikiHow marks an article as reader-approved once it receives enough positive feedback. The cabin heater has stopped blowing warm air, the a/c works fine but just cold blows when I turn the heat up. 2004 Nissan Maxima ABS, SLIP, VDC OFF And BRAKE Lights Are On. A few months in the past I set a new air compressor in my auto. Nothing but cold air was blowing through the vents...it never warmed up. Need help please. ", "It helped me know what look at before taking the car to a garage. As long as you are set on normal AC and not MAX that is true. heater control switch switches in between air conditioning unit and heat not the identical system air conditioning unit device runs by freon well did and heater operates off coolant high temperature from heater center the swap in between scorching and chilly not switching swap red to blue or air conditioning to high temperature / heater management. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. I'm not sure what else to check. This is good to slow rust. Yes, but you well need to see a mechanic to fix a smaller belt for you. My truck heat works; it defrosts, but only on 3 and 4. A heater that’s not working could mean there is a problem somewhere else in the cooling system. See a technician for advice. Maybe the fan is malfunctioning. Unless it smells or doesn't dissipate, don't worry about it. someone. He’ll think you know what you’re talking about and won’t rip you off. Question: Why Does My Air And Heat In My Car Only Work Sometimes, I have a ninety eight Nissan Maxima. A car's heater … The heated air circulated through vents into car interiors is directed by the heater fan. I've check he fuses they all look ok, the fluid level is ok. What could be the issue? ", knowing more about this career, thanks a lot! There are other components that could also be bad. If you have been driving for sometime and you noticed the system stops working the first thing to check it the engine temperature gauge or warning light. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/d\/d8\/Diagnose-a-Non-Working-Air-Conditioning-in-a-Car-Step-1-Version-7.jpg\/v4-460px-Diagnose-a-Non-Working-Air-Conditioning-in-a-Car-Step-1-Version-7.jpg","bigUrl":"\/images\/thumb\/d\/d8\/Diagnose-a-Non-Working-Air-Conditioning-in-a-Car-Step-1-Version-7.jpg\/aid947911-v4-728px-Diagnose-a-Non-Working-Air-Conditioning-in-a-Car-Step-1-Version-7.jpg","smallWidth":460,"smallHeight":259,"bigWidth":"728","bigHeight":"410","licensing":"

© Tarus Products Inc. All rights Reserved