Car Air Conditioner Works Intermittently

Air conditioner wasn't working. Sometimes there can be worn or unmodified AC systems that function for years without a problem. 11 posts All Vehicles > KIA > 2007 > SPECTRA > 2. 7-liter gas-powered V8. I just consider air conditioner repair a job for professionals and if you say I was told it could be part XYZ on the internet you might. )Repair Cost $229. It's not that the clutch fails to engage. In many of these articles we focused on some of the worst AC problems an old car can have. We took it to the local Chevy Dealer for the recall and had them evaluate the air conditioning. The car had less than 40,000 miles on the odometer and was well-maintained (thanks to me). Why does my air conditioner only work sometimes (intermittently) in my 2000 Toyota Tacoma PreRunner? It stopped working last summer and a few days later it was cooling again. The different sounds range from whooshing to buzzing and everything in between. About a month ago, thinking that low gas was what was causing my air conditioning not to work, I got the gas recharged at a branch of Budget. A/C and fan work when car is cold. Most vehicles today have one multi-speed fan that blows air through a series of ducts and vents based on the driver's selection in their climate control system. This is why an air conditioner doesn't seem to be working very well on a really humid day when in fact it is operating perfectly. Schedule an appointment online or stop by your nearest location today!. Try working with what you have first before you replace it. The air being expelled inside seems the same too. Car AC Not Blowing or Is Your Car AC Fan Not Working? If your car’s AC isn’t blowing air, it could be a problem with your car’s fan. Having an issue with the AC on my 99 SHO. I just wanted to post this because I was having some issues with my air conditioning on my 2007 Fusion. The ac went out on us about 6 months ago so we had the compressor replaced. I can shut it off for 5 minutes and then turn it back on and it will blow cold for another few minutes before going back to warm. Bad Car AC Expansion Valve Symptoms. The standard unit has a resistor The Deluxe/automatic A/C (the one where you set the temp number and the car maintains that temp) will have a control module. The Air conditioning (AC) system in your Subaru is made up of the following. Day five -> Started hearing noise from the brakes and they stopped working intermittently during highway drive. Any help is greatly appreciated. The six most common car A/C issues are:. When I start my car the AC will turn on 70% of the time and work without any problems (no audible indications that the blower is going, full air on each setting). Especially if is one of those days where putting down the windows just won’t cut it and help cool it off. Does the car AC Compressor, works all the time, even when AC is turned off ? Compressor runs with motor with the help of the belt. Both fans(AC CONDENSER and radiator fan turn on). Checking these simple items, switches and controls, including some you may not know about (overflow pan switch for example) may get your system running without a costly service call. Before you waste time searching for a broken wire, try swapping out the vehicle horn relay (photo). Next up is knocking or clicking sounds while the air conditioner is running. Replied by K24A4 on topic Intermittent AC Failure (2008 Saturn Vue XE) Work and travel has kept me from being able to work on this problem - but the car has "acted up" the past two days. To exit the self-test and clear all DTCs, press the DEFROST button. When I select 'auto' which should turn the air con on, well it doesn't. Now look at the pulley of the air conditioner compressor. If you notice a loud, buzzing noise coming from your air conditioner, chances are your unit is malfunctioning. Air conditioner intermittently works. Six were constructed, each being subtly different from the rest. When it does, it runs the air over vanes full of super cold air conditioning fluid. The other has to do with the car stereo seeming to turn on, but no sound ever comes out. The fan will stay on, the AC light on the dashboard will still be on, but the condenser will stop working. If two hot wires or a hot wire and a neutral wire are touching at the wire connection point of the air conditioner unit, then a fire could spark. After testing the areas mentioned above it might be time to turn your attention to model specific common air conditioning electrical problems. Why is My Air Conditioner Blowing Warm Air? July 30, 2014 / By Comfort Pro - a Reading, PA company / Air Conditioning • Blog • Repair / ac • air conditioning • hvac / 0 Comments Home AC units have dozens of parts that must function properly in order to efficiently cool your home. Car: 2006 Honda Civic LX 2 Dr Issue: Intermittent air conditioner cooling Hello folks, My 06 Civic's AC seems to be misbehaving. The condensor fan unit outside turns on and runs but mostly I don't get cold air on hot days, 95 deg+. The windows and everything else work just fine and no lights come on the dash as some people have posted on here. Thanks to this thread I was able to learn about the COMPRESSOR CONTROL VALVE; so I did order it at a place on-line for $75. When you turn on the air conditioner in your car, do you often have a distinct car air conditioner smell that is weird or repugnant? If this is the case, then there is definitely wrong with your car air conditioner. I had my mechanic check the compressor (running correctly at about 250/40) and the freon (had a minor leak that was fixed). A regular car air conditioner service or regas will help to ensure optimum passenger comfort, particularly on those hot summer days when you need it the most. The local mechanic said they believed it was the air conditioning (of course the car wouldn't make the noise or produce smoke for them) and serviced it and added freon. )Repair Cost $229. Fuel gauge problems are commonly the result of faulty electrical grounding at the tank or a problem with the sending unit inside the tank but can also be caused by faulty wiring or a bad fuse. Car air conditioning is wonderful during a hot summer. Car has had a few overheating episodes recently. The air being expelled inside seems the same too. Let Bruce Bonebrake guide you. An evaporator covered in ice can’t cool the air, so you would have to wait until the ice melts, which is why the cold air eventually returns. Take our quiz & meet the car you’ll love. BMW E36 A/C Problems - Air Conditioning - 318i, 323i, 325i, 328i, M3 The problem is intermittent - sometimes it works fine. Air conditioning units make a lot of noise. For several summers my air conditioner did not give out cool air. April 10, 2015. Ever since then though, the central air conditioner blows cold only intermittently. Is the AC breaking on these car's a common issue?. Car Air Conditioning Service. I just consider air conditioner repair a job for professionals and if you say I was told it could be part XYZ on the internet you might. car ac working only sometimes 10 Answers. Hi, it did work in my case. The fan will stay on, the AC light on the dashboard will still be on, but the condenser will stop working. When I got this car it had r12 Freon in the. After a bit more driving, the abs and parking brake lights turned off and the gauges resumed normal operation. I see these problems most often every summer in our 27 year old HVAC business. Air Handler Sounds. Depending on the type of. This squeal is difficult to ignore, and you probably shouldn't ignore it. An AC is basically a heat mover. Required Materials for this Car Horn. If your evaporator coils are frozen over, your air conditioner will not be able to remove heat from your home effectively and your system is likely to malfunction and turn off. Make sure your A/C system is ready to keep you cool all season long. We knew this was replaced from the same fortuner as well. Sometimes when we have the AC on the vents start blowing warm or hot air instead of cold air. Sometimes car will blow cold air (only when pipe coming out of evaporator (low side is cool to touch and sweating; otherwise, pipe gets hot again and will not cool car. When it's working, it blows around 45 degree air. The ac/heat worked great until a couple days ago. Second, I find the AC works intermittently, when i turn on the AC there will be an "AC Engagement" voice, then I open the front keep the AC running at MAX. When you have an expansion valve that stops working properly, the symptoms will show up quickly. To determine if the selector switch is at fault, try making selections on the air conditioner's control board. But then it will stop working. About a month ago, thinking that low gas was what was causing my air conditioning not to work, I got the gas recharged at a branch of Budget. A blinking or intermittently activating check engine light; An active gas warning light when the vehicle has plenty of gasoline; Smoke from the exhaust emitting intermittently, instead of in a steady stream; How to Test a Coil Pack. What could this be? Did something I do affect it? Please help if can. AIR CONDITIONING SYSTEM – GENERAL DESCRIPTION AC–3. I believe the fan clutch needs replaced because air conditioning has started getting warmer at idle but am trying to diagnose the squealing sound that sometimes happens when the air conditioning is turned on. Thanks to this thread I was able to learn about the COMPRESSOR CONTROL VALVE; so I did order it at a place on-line for $75. I am having issues with my AC. If you where local I'd work a good deal out and let you pull parts from my old box as the fan and direction switches worked perfect. Hi, our A/C unit stops cooling intermittently, the fan remains running but the AC unit outside expels non-warm air (if that makes sense). When it works, it's great - nice and cold like it should be. Moved thermostat back to the cool position and it still blows hot air. Mine would work fine in cool and warm weather, but when the outside temperatures got hot, it would quit working. air conditioner problems: help needed for ac we have a 2006 passat 2. Runs cold when moving at normal driving speeds, or when running high RPM. I bypassed it with an inline fuse and haven't had a problem with it for the last few months. Toyota Genuine Parts are made to the same high-quality standards as your Toyota and designed specifically for your model. Common Central Air Conditioner Problems Your AC unit isn’t cooling rooms evenly. Also cars use flaps to regulate air mix from heater core (it is in your dash somewhere) to achieve correct temperature. Seems like it won't continue to work at highway speeds, but works much better putting around town. A problem that Ford should take care in guarantee considering the poor quality of the sensor used and because it is a recurring problem on several. Anyone ever hear of such a thing and what would cause this?. my air conditioner blew up on my way to the National meet last year. The odor is hard to describe it does smell almost "toxic". Average failure mileage is 7,900 miles. I had my mechanic check the compressor (running correctly at about 250/40) and the freon (had a minor leak that was fixed). If I turn the car off and on then it will instantly work. The Refrigerant is fine. Why does my air conditioner only work sometimes (intermittently) in my 2000 Toyota Tacoma PreRunner? It stopped working last summer and a few days later it was cooling again. Ive presently got a 2008 Honda Civic 1. Air conditioning units make a lot of noise. When the AC compressor clutch in your car suddenly stops working and does not engage, it could be a sign of serious problem as cool air flow would not be blown into the engine. I have a 2000 GMC Sierra, 5. But then it will stop working. This is often caused by loose mounting bolts that secure individual air-conditioning components. Speedometer wouldn't move at all. I may not drive. If you notice a loud, buzzing noise coming from your air conditioner, chances are your unit is malfunctioning. The air conditioning system in your 2006-2012 Honda Civic is comprised of several different components that work together to circulate the refrigerant that cools the air entering the cabin. If I switch-OFF the AC and keep it in the 'OFF' mode for 6-7 minutes and then if I switch-ON the AC, then it works but again it works only for 6-7 minutes. The air will not blow from front of dash. When I stop it just blows warm air(or very mild cold). A/C and fan work when car is cold. AC Intermittently Working (Clutch not engaging) Sometimes restarting the car gets it to kick back on, or even letting it sit a while. I had my mechanic check the compressor (running correctly at about 250/40) and the freon (had a minor leak that was fixed). While your situation the problem is cold air, it may be how this system gets stuck in your car. When it would stop working, I discovered that by setting the selector to the defrost position, I would get cold air from the defrost vent. Then it started blowing hot air out of the vents. If you where local I'd work a good deal out and let you pull parts from my old box as the fan and direction switches worked perfect. Checked the pressure and it seemed a little low, but okay. Car will only click over and unable to shift car into neutral. Thailand #1 Car Exporter to Egypt, Australia, UK, Dubai Exporter to Egypt in North Africa. Also note the AC will not cool properly when it's overcharged. Mine would work fine in cool and warm weather, but when the outside temperatures got hot, it would quit working. One of the most disconcerting noises you'll hear coming from an air conditioner is a high-pitched squealing sound. Many of the problems that make air conditioning units noisy are the result of screws in panels throughout the unit that have been vibrated loose. I put a thermometer in the drivers side vent to track actual temperature coming out of the vent. Additionally, if there is any arcing or smoke coming from the selector switch, replace it. Checked refrigerant level and that is normal. I have no codes in forscan, and I swapped the relay with the rear wiper with no change. BUT, if the sensor malfunctions, the ICE never melts off and the fins become packed with solid ice with no air flow over the cooling fins. com FREE DELIVERY possible on eligible purchases. Air Conditioning Not Working (system performance,. MERCEDES BENZ SLK R170 Intermittent air conditioning Dear friends My R170 slk230 (UK specification model) now at 90000kms has developed a couple of annoying problems. I started the car and idled in the driveway for 10 minutes, letting it warm up to operating temp, and it was blowing warm air. the air compressor, the drive belt plus the HVAC integrated control unit. Looks like the only other thing it can be is the blower fan resistor or the actual switch. Also has new radiator and AC condensor coils (due to getting tagged in and intersection 2 years ago). Car Talk — Vacuum problem could cause air conditioning to malfunction when van speeds up it isn’t really working. Fuel gauge problems are commonly the result of faulty electrical grounding at the tank or a problem with the sending unit inside the tank but can also be caused by faulty wiring or a bad fuse. Find the best Auto Air Conditioning Services near you on Yelp - see all Auto Air Conditioning Services open now. Toyota Genuine Parts are made to the same high-quality standards as your Toyota and designed specifically for your model. Any suggestion?. The compressor doesn't stay on. If I switch-OFF the AC and keep it in the 'OFF' mode for 6-7 minutes and then if I switch-ON the AC, then it works but again it works only for 6-7 minutes. Also has new radiator and AC condensor coils (due to getting tagged in and intersection 2 years ago). I tried to see a. This can be the leading cause for foul HVAC odors for many homeowners, which raises concerns about indoor air quality. I'm hoping someone can help out or let me know if you have experienced this same issue. My Mercedes ML350 air conditioner works intermittently. The local mechanic said they believed it was the air conditioning (of course the car wouldn't make the noise or produce smoke for them) and serviced it and added freon. Here are some things to keep in mind when you are experiencing a problem of car air conditioner blowing hot air. 2003 Lincoln Town Car air conditioning compressor won't kick in during the first 15 minutes of engine operation. Toyota Genuine Parts are made to the same high-quality standards as your Toyota and designed specifically for your model. Thailand #1 Car Exporter to Egypt, Australia, UK, Dubai Exporter to Egypt in North Africa. An air conditioner running low on coolant, on dirty coolant on faulty electrical wiring can end up ruining the entire air conditioning compressor. My Central A/C Fan is Not Working, What Do I Do? A central air-conditioner is an elaborate system that involves parts such as an evaporator, a compressor, a condenser, fans, and refrigerant to run through the unit. An A/C performance check is the easiest way to uncover what's plaguing your car air conditioner. Take our quiz & meet the car you'll love. We took it to a place for troubleshooting, but they obviously didn't know much. They left the car running in the service bay and quickly started to troubleshoot with me standing there. When it works, it’s great – nice and cold like it should be. The different sounds range from whooshing to buzzing and everything in between. Your Online Auto Repair Resource. They've checked the obvious stuff like leaks or low coolant. The mechanic says it is most likely an electrical issue since everything else was replaced and is in working order. I tried to get my wife to bring the car directly home from work today, but she has a class at the gym. How to deal with Car Air-conditioning Problems The car AC works exactly like a household air-conditioner or a refrigerator. Typically, this is a screeching sound, although you may hear rattling, too. It's going to be summer soon, and in many parts of the world, things are going to be heating up. Centeral Air working intermittently - any ideas? go to walmart and spend $100 on a room air conditioner for the baby's room. I heard an intermittent squeal at idle from the engine compartment yesterday, while taking my wife's '78 911SC out for a day trip. On hot days it takes FOREVER for my car to cool down to where it's even bearable. Was very easy to use and worked like a champ! Thanks Discount Auto for stocking this!. Questions about AC intermittently blowing cold air, then hot, then cold again. Its the same at both the front and rear vents. Any help is greatly appreciated. Often there are signs that there's an issue with the A/C system and that a repair might be necessary. The mechanic says it is most likely an electrical issue since everything else was replaced and is in working order. After you plug in the two connectors to the fan the AC will only work for a short time before it heats up the AC relay and shuts the compressor clutch down. I put a thermometer in the drivers side vent to track actual temperature coming out of the vent. The issue is that it will work for a little bit but then it will start I blow hot air. Air from some vents and not other vents sounds more like a damper/door issue in the duct work. I have a 2004 F150 Heritage. If I shut off the car and wait 1 minute the air comes back on cold and eventually stops. Recently when running the AC, it will randomly begin blowing hot air instead of cold. I have an issue with the AC in my car. Once I got going, seemed to be fine again. It seemed to work fine. Blower motor works intermittently - 2005 Buick lesabre. I have a Ford Focus station wagon year 2000. 2001-2005 Civic - Symptoms: Cluster intermittently dead, odometer blank or reads 888888 Repair Cost $229. I have absolutely no idea what the problem could be. The first thing you should look for are signs of leaking or an A/C compressor that does not engage. I may not drive. Additionally, if there is any arcing or smoke coming from the selector switch, replace it. So you went for a road trip or a long drive, and after 30 minutes of driving realized that your AC suddenly stopped working or switched to blowing warm air. The air conditioning on the drivers side and rear are working group fine. Crackling within the main unit could derive from something serious, like an electrical fire, especially if it's accompanied by a funny smell. The Alternator. Maybe even charge the A/C system if needed. A sudden loss of all gas would give you the same symptom as the clutch coil but you would probably notice when the gas escaped, or find evidence of compressor oil on the floor or on the car. Turn the air conditioning on full blast. We knew this was replaced from the same fortuner as well. My air conditioning just recently stopped working, but is very inconvenient not to dude to the 100 degree weather in Tx. My car is a 2001 325ci I purchased new. My 1999 New Beetle has an intermittent problem with its air conditioner - sometimes it works; sometimes it doesn't. Air conditioner compressor is a significant part of any AC unit, which is placed outdoor and does the pumping of refrigerant through the system. It seems that simply the air is diverted to other par or stopped from coming into the car cabin. There are many causes of automotive air conditioning problems. One of the common mistakes people make is that they buy AC just based on their budget and not based on the requirement of the room. I'll turn off the AC for about 30 min. Let me clarify, it is not that the air conditioner unit does not properly cool or heat the car, but instead it just does not turn on. 8 Big Mistakes You're Making With Your Air Conditioner can save you hundreds on your annual AC bill by automatically raising the temp at those times of day when you’re at work or away from. Is your air conditioner A/C not working or blowing hot air? The Air Conditioner system can get very complicated in cars but that doesn’t mean that you can’t perform some troubleshooting yourself. by Daniel Stern (part 5 of a series) The fan moves air across the radiator (and A/C condenser, transmission fluid cooler, power steering fluid cooler…) when the car's not moving fast enough for the natural airflow to cool it. An A/C performance check is the easiest way to uncover what's plaguing your car air conditioner. Click here for detailed information and to view our entire inventory of Used Trucks. This makes operating your car’s air conditioning more convenient and user-friendly. This article will help you decide on what to do when the AC compressor clutch is not engaging. My Mercedes ML350 air conditioner works intermittently. before 2 weeks i showed 2 car ac tachnicians both told to change cont. In many of these articles we focused on some of the worst AC problems an old car can have. Car is currently at the Ford dealer and they are "troubleshooting" this and act like they have never seen the problem before. I checked behind the control panel everything is plugged in snug. A/C and fan work when car is cold. Central air conditioner units are meant to provide cooler temperatures for your home whenever you need it. If I switch-OFF the AC and keep it in the 'OFF' mode for 6-7 minutes and then if I switch-ON the AC, then it works but again it works only for 6-7 minutes. We have 11,171 Vans for sale that are reported accident free, 9,708 1-Owner cars, and 1,257 personal use cars. Sometimes, the A/C suddenly stops blowing ice cold air, and starts blowing slightly cool air. I am experiencing intermittent AC functionality. Troubleshooter: Is your car's air conditioning blowing hot air? If your vehicle’s AC system is working, but just doesn’t seem to have the chill it used to, check the condenser, usually. Air conditioning isn't rocket science, but it absolutely requires understanding the entire system and how all the parts interact. When it works it works great. com FREE DELIVERY possible on eligible purchases. The AC usually blows extreamly cold and works great, however sometimes it will start to blow warm. When moving it works fine and is cold as when it was new so i do not suspect low freon or freon leak. A/C Question - Only Works Sometimes Okay, so I recently had the air conditioner issue where the fuse box on top of the battery gets a little melty and the fuse no longer makes proper contact. The car is a 2006 Jetta with 200,000 miles. Having an issue with the AC on my 99 SHO. Hi, our A/C unit stops cooling intermittently, the fan remains running but the AC unit outside expels non-warm air (if that makes sense). While your situation the problem is cold air, it may be how this system gets stuck in your car. The fan will stay on, the AC light on the dashboard will still be on, but the condenser will stop working. Any ideas?. We took it back to the shop and they noted that the compressor was shutting off for some reason. The selector switch directs voltage to the fan. Sometimes when we have the AC on the vents start blowing warm or hot air instead of cold air. It seems to work when it wants to but it does seem to stop cooling if I've been out driving a couple hours. Please enable it to continue. When it works, it's great - nice and cold like it should be. Hi, it did work in my case. What is a Charging System? The modern charging system hasn't changed much in over 40. Whe I turn it on there is no problem with the blower but it just blows warm air. The climate control has worked flawlessly since I bought the car in July 2011, until a few weeks ago. When the motor — located inside the door — cools down, it may start working again. The air will not blow from front of dash. Recently when running the AC, it will randomly begin blowing hot air instead of cold. I have a 2004 F150 Heritage. A/C works intermittently. I have a 2005 Holiday Rambler Navigator with a Roadmaster chassis. If you are looking for information on recharging and service I wrote a more recent article about recharging car air conditioning. And, being rather warm in the car, I lowered the temp to 60 degrees, and while it was blowing out somewhat cool air, it was NO WHERE close to being cold air - certainly not supposedly 60 degrees. The air conditioning system is often regarded as just the air cooling side but should be regarded as the entire air blend, heating and cooling systems. problem seems intermittent. Depending on the type of. Faulty parts can even short out the electrical components. A regular car air conditioner service or regas will help to ensure optimum passenger comfort, particularly on those hot summer days when you need it the most. I need some help. mostly blowing out hot air, sometimes (briefly) working normally. If you are experiencing an issue with your Trane system, our guide can help answer your questions. Let Bruce Bonebrake guide you. I went for a drive and it would come on and blow cold and then suddenly go back to blowing warm air, back and forth, at random. The air conditioner will work for about 15 mins after just starting the car, it will then stop cooling, and if left on will start back up after an hour or so, then work for 15 mins and then stop. Please enable it to continue. The Alternator. An air conditioner running low on coolant, on dirty coolant on faulty electrical wiring can end up ruining the entire air conditioning compressor. BOTH fans come on (ac condenser and radiator fan. The air conditioner works intermittently. But most of the time was not working at all, just hot air. Read more on this subject if you plan on finding a mechanic to recharge the car air-conditioning. car NOt overheating). It was as if the AC had turned off completely. Troubleshooting Guide. When they are installed properly they will last for years, but there are also numerous. It is important when selecting the proper thermostat to know if your system has a single transformer or a double transformer. AC Intermittently Working (Clutch not engaging) Sometimes restarting the car gets it to kick back on, or even letting it sit a while. The windows and everything else work just fine and no lights come on the dash as some people have posted on here. Is my aircon working? Introduction. Went out (blew hot air) intermittently for a while, then started always blowing hot air. Listen for the accompanying sound of the blower motor. We do that in several ways. I had it charged, checked for leaks, and the mechanic gave me a little free troubleshooting It seems that the high pressure side gets too high. The air seems to work when the outside temp is below 80 degrees but doesn't work for 90% of th. I have taken it to have the air conditioner checked, they put dye in it and confirmed that there are no leaks. Some cars have a shut off feature that will disengage your car air conditioner compressor if your engine is under duress. My wife's 2005 SLK 350 is exhibiting intermittent air conditioning. Tl* the contact owns a 2009 honda accord. the AC would work great, and then all the sudden (usually when idling) the air coming out of the vents would change to blowing outside temperature air!. Mind you she hasn't had too use it since last October when she was still under 60,000km, so something broke during the winter months. 4, and about a couple of months ago i noticed i wasnt getting cold air coming through - there was no difference in the temperature with air con on or off. A regular car air conditioner service or regas will help to ensure optimum passenger comfort, particularly on those hot summer days when you need it the most. We provide free auto repair tips on finding and fixing problems with car heaters that are blowing cold air out the dash vents. A faulty automotive air conditioner can be one of the more difficult issues to diagnose and repair. You may have to register before you can post: click the register link above to proceed. Typically an iced over evaporator is the culprit. The plates are formed into a plate group, which holds a number of plates of the same polarity (for instance, all positive or all negative). The Regular Cabs seat up to three while the Quad Cabs offer seating for up to five. A blinking or intermittently activating check engine light; An active gas warning light when the vehicle has plenty of gasoline; Smoke from the exhaust emitting intermittently, instead of in a steady stream; How to Test a Coil Pack. Make sure your A/C system is ready to keep you cool all season long. Does the A/C start blowing warm air on the highway? In stop-and-go traffic? When your car A/C blows cold then warm, head to your nearest Firestone Complete Auto Care. This makes operating your car’s air conditioning more convenient and user-friendly. Weather forecast, local to international. Additionally, if there is any arcing or smoke coming from the selector switch, replace it. I have a 2008 Honda Civic with about 190k miles on it (yes, it's time to consider getting a new car). Hi, I have a car that service manual says it uses variable displacement compressor SD7V16, however on the used car i bought the compressor is SE7H13 which i learnt is not a variable displacement type. If you have a situation where your car’s air conditioner compressor clutch doesn’t engage, try the troubleshooting techniques described here. The 2016 Hyundai Tucson has 28 problems reported for a/c intermittently blows warm air. When I was dealing with this issue I had warm/hot air blowing from all vents. How to deal with Car Air-conditioning Problems The car AC works exactly like a household air-conditioner or a refrigerator. But then it will stop working. CAUTION: when you mount the new thermostat handle the thermostat housing with allot of precaution because it can easily crack and you end if with a leak (where not only water escapes but the engine can get air inside the coolant system which is a bag factor when it comes to overheating). To stop this, adjust the temperature on the thermostat or switch the unit either on or off rather than the automatic. Q: The AC blower on my car only works intermittently.