Skip the auto shop - Our mechanics make house calls

Q: when I turn the ignition switch to on, the ac compressor clutch will engaged. Disconnected the ac control switch and still

asked by on

When I turn the ignition switch to on, the ac compressor clutch will engaged. I disconnected the power to the air conditioning control but still does the same thing. Do I have a faulty ignition switch?

My car has 91000 miles.
My car has an automatic transmission.

On some earlier years of Chevy they used to have the A/C compressor to come on when you are turning off the engine to help the prevent the engine from suffering from excessive after-run conditions that the engine will continue to run even though the car is switched off. This is on for about a 5 second timer after the key is turned off.

If you are having the A/C compressor stay on when the engine is running even though you have the A/C or defrost off, then you have probably have a problem with the A/C compressor relay is sticking on or is shorted causing the compressor to stay on. I recommend having the system checked by a mechanic like one from YourMechanic to diagnose the system for you and replace your A/C compressor relay if necessary.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  • Home
  • Questions
  • when I turn the ignition switch to on, the ac compressor clutch will engaged. Disconnected the ac control switch and still

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: Map sensor

Hi there. This link will show you an engine diagram for the 5.7 Ram engine. However, I recommend that you purchase a service / repair manual for your vehicle to give you instructions on how to complete this repair correctly....

Q: My car's engine is overheating, what could be the cause?

An overheating engine can be caused by several components. A new thermostat is a great place to start, and knowing that it is not the problem we can focus elsewhere. If the thermostat was suspected, then you may have another...

Q: I have a 1980 jeep j 20 and can only find two Zurk fittings one either u joint and was curious if there is anymore else where?

You can rely on your visual inspection as there will be only one fitting per joint, so you found them all at least on the drive shaft. Any component (including suspension components) that you see that does not have a...

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...
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...
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.