Why does my car AC only work when moving?
Another reason why the air conditioner works only when your car is moving may be low freon levels. If your air conditioning system freon levels are below what is needed, it will not cool properly. As a result, it only cools when your car is moving as the car is then capable of pumping the freon with ease.
Why does the AC blow warm at idle?
Since the AC compressor is driven by the engine, it doesn’t pump as much refrigerant when you’re at a stop or driving slowly. If the system is low on refrigerant, it will show up as AC blows warm at idle and blows colder when the engine is running at higher RPMs. Get your system refrigerant level checked.
Why does the AC blow cold air when the car is moving?
My car has an automatic transmission. When the car is moving, versus stopped, there is more air flow over the condenser (the heat exchanger in front of the radiator) and that airflow is essential to system operation. To maintain airflow when the car is in stop and go traffic, or is completely stopped, condenser fans will come on automatically.
Why does my a / C blow cold then warm while sitting still?
The change from cool to hot and vice versa is very gradual, and the temp out of the vent even while sitting still in not as cold as I would expect. I’ll check the coolant reservoir as you suggest.
Why does my a / C fan keep blowing warm air?
The “on” setting will make the fan blow continuously – even when your A/C isn’t cooling. That will make warmer air blow through your vents. Your outdoor and indoor A/C units work together to expel heat from your home.
Why is my a / C blowing warm air?
A refrigerant leak is unique in the sense that refrigerant evaporates instantly into a gas once it isn’t under the pressure of your closed loop A/C system. A/C systems are sealed and therefore don’t require refrigerant top-off’s. If the refrigerant level is low then there is a leak that needs to be addressed.
What does it mean when your AC is running but not Cooling Your House?
Your thermostat is switched to ON. If your thermostat switch is set to ON, that means the blower will run constantly—even when your system isn’t cooling your home, which will result in warm air blowing from your vents. How to fix it: Switch your thermostat to AUTO (see image below), so air only blows from your vents when the AC is cooling.
What to do when your car AC blows warm at idle?
GM and others use either a three-relay set up to run the two fans at low speed for normal driving and high speed when the AC is on or the low speed can adequately cool the radiator. Other carmakers use a solid-state speed relay that varies the speed of the fans based on engine cooling and AC needs.
What to do if your air conditioner is blowing warm air?
If your air conditioner is blowing warm air, or just not working properly, it is best to schedule service ASAP to maximize your comfort. Automotive A/C systems have certain intricacies in their design that render them difficult to repair without the proper equipment and knowledge base.