This is normal because the system needs time to cool the air. Sorry if this has been posted and answered before...I have a brand new (less than 4k miles S90D) and today my AC stopped blowing cold air, even tough it worked perfectly all day. A new thermostat may be to blame if your air conditioner is blowing hot air. I have a 2003 bmw 32is car was sitting for a year airconitioner blowing hot air what do you think is wrong. Refrigerant may slowly leak out of the system over days, weeks or even years. Made 1 stop and when I returned to my car and started driving, it was only blowing warm air. If you need help with a warm air issue or another professional A/C service in Eastern North Carolina, contact us at Jackson & Sons . Here’s another air flow issue that can result in your AC blowing warm air. Pelican Parts Forums > BMW Forums > BMW Technical Forums > BMW 5-Series E28/E34/E39/E60/F10/GT: Fan and AC blowing HOT air How to Troubleshoot an Air Conditioner That Blows Warm Air. Why is My Car Air Conditioner Blowing Hot Air? Please help If you’ve been having trouble with your car’s air conditioner lately, there are a few reasons it could not be working properly. It could be, as John says, that the compressor isn’t engaging. The engine idle speed will not undulate as normal when the air conditioner is turned on, and the air … The first thing to check is the levels of Freon in the system. You WILL make it worse. Hot air should not come from the top even if the rear heat is on it should come from the bottom. That means that the only air that can blow over the evaporator coils is the air inside the unit itself. That air is already extra hot from the compressor and condenser, so it’s often too warm to cool down when it passes over the … Sometimes, a circuit board is unable to handle the amount of power required by your HVAC system. The lights on the ac/heater instrument panel ill … read more I have cheked the freon level it is to the max, also added some oil into the line, the problem persists. What causes that? Thermostat; It may sound obvious, but the first thing you should check is the thermostat. Was not overly warm here today , about 84 degrees. Air Conditioner Blowing Hot Air – Hello Richard, my air conditioner is blowing hot air today and I am wondering what’s going on with it. Jun 25, 2009 - Hot air from vents-driver side and cool air from vents on passenger side. I took the car right back in to … The problem of a car air conditioner blowing hot air on one side is mostly seen in cars which have a dual zone climate control system. He said it was blowing cold air. Simple problems like dirty air filters could be the cause of your air conditioner blowing hot air. If it’s hot in a situation of car air conditioner blowing hot air , then it’s an engine problem. If that’s the case, then hopefully you’ve got your receipt and can exchange it. Three Reasons why Your A/C is Blowing Warm Air. These are some of the reasons yuo may be experiencing weak or no air. You should be able to look up the location of your compressor and see this for yourself, depending on what BMW you have. Get AC maintenance done during the spring. There are many causes for a central AC blowing warm air, some are silly, others are much more serious. But when the ac unit isn’t serving its goal, things become a little uncomfortable for us all. Im driving it to the Austrian alps on Friday, so this is not ideal. A refrigerant is a special kind of gas (but compressed to liquid) that gives the unit its cooling ability. Due to the high temperatures in the summer, a car air conditioner is more than just a comfort feature, it is a necessity! If you haven’t had your system maintained in a while and your AC is blowing warm air, the next step is to check your air filter, and change it if needed. When it is not, which of course occurs on the most brutally hot day of the year, the A/C suddenly becomes a cruel joke, blowing warm, stale air into your vehicle. It is mild weather here and still winter, but the temperature here got above 80° F today, and when I came home from work, I decided to turn the AC on to cool the place down a bit. 6 people found this helpful. AC blowing hot or warm air? Failing Expansion Valve – Is your auto’s A/C alternating between blowing cold then hot air? But if you keep driving and you’re still sweating, it’s time to bring your car to the experts. 10 years ago. If this is the case, your system can shut itself off which could be a reason your AC is blowing warm air. When you get in your car on a hot day, your car will likely blow warm air at first. 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