Q: Cars stalls when the AC is turned on.

asked by on

I was told I need the AC compressor replaced because my car stalls when the AC is turned on.It also stalls when I turn on the defroster.

A seized AC compressor can stall your engine when you turn on the air or defroster because it sends a signal to engage the clutch on the compressor, which causes more resistance than normal. But there are switches that level out your idle electronically when there is increased load. Have a certified mechanic like one from YourMechanic test and verify that your idle control system is working correctly and that the AC compressor is the only problem.

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. Cars stalls when the AC is turned on.

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 cranking, but then dying

From my experience, checking the fuel filter and spark plugs is a great place to start when trying to determine why your VW beetle is sputtering and stalling out. The symptoms you describe however sound like your Volkswagen is experiencing...

Q: The key easily turns from lock all the way to the right with no resistance

The problem is not the ignition key cylinder but the ignition switch. If the internal steering column mechanism is broken, then it will not turn the ignition switch. The ignition switch will have to be removed to see if the...

Q: How Does the Front Defroster Work in a Car?

Selecting the front defroster mode directs warm air up through the ducts at the base of the windshield in order to clear moisture in warm weather or frost in colder temperatures. In cold weather, the defroster becomes more effective after...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...