Q: AC stops working when idling

asked by on

The AC stops working while I am idling. Then the car feels like it is going to stall. The AC is fine when the car is moving.

It is possible that your compressor clutch is producing more drag than usual, causing the near stall at idle. When the engine RPM is raised, the belt rotates faster, forcing the compressor to spin.

It is also possible that you are not getting enough air flow through your condenser on the front of your vehicle. When driving at higher speeds the air is forced through the condenser naturally. At idle, there is far less air going through the condenser and if it is clogged, the air the cooling fan produces may not be enough to cool down the refrigerant, although this would not explain the near stall.

A final possible cause of this issue would be that your cooling fan or A/C fan is not working. This would cause the engine to possibly stall if overheated and would certanly cause a lack of air conditioning at idle.

I would suggest having your air conditioning system inspected by a professional mobile mechanic to diagnose the issue, and recommend the best solution.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. AC stops working when idling

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Car using too much fuel

Hi There, Code P0455 indicates you have a loose fuel cap or potentially a large leak in your evaporative emissions control system. I would suggest first trying to tighten the fuel cap as this is a common cause of this....

Q: The car stalls occasionally as if the fuel is not been pumped

It sounds like you may have a fuel supply issue that corresponds to the load put on the motor when you turn the A/C on. This may be related to a faulty MAP sensor. The Manifold Absolute Pressure (MAP) sensor...

Q: Radio/Speedometer not working?

Hi, thanks for writing in. I'd be happy to provide my insight. This can be caused by a few things. There is a speed sensor at the transaxle that emits a signal to the computer, however if the car is...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.