Engine Revved Up When Air Conditioner Turned Off

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Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=146268
Printed Date: May 02, 2025 at 11:23 AM

Topic: Engine Revved Up When Air Conditioner Turned Off

Posted By: rcuestas28
Subject: Engine Revved Up When Air Conditioner Turned Off
Date Posted: June 10, 2020 at 9:24 PM

My car had revved up automatically when turning off my air conditioning. Seemed like my vehicle was about to shut off. I'm assuming that is not okay. Am I right? If so, what could be the issue?

05 chevy cavalier sedan

Replies:

Posted By: i am an idiot
Date Posted: June 11, 2020 at 5:52 AM

How high did the engine rev?

Posted By: rcuestas28
Date Posted: June 16, 2020 at 3:28 AM

It had dropped close to 250RPMs, then revved up a little over 1000RPMs. It is no longer doing so now. I feel like it happened because I was using the AC while in park for a good amount of time. Maybe that is why?

Posted By: i am an idiot
Date Posted: June 16, 2020 at 4:01 AM

When the AC compressor is on the car slightly revs the engine so the strain of the compressor does not kill the engine when it is idling. Possibly a solenoid was stuck and did not disengage when the compressor turned off. 1000 rpm is nothing to worry about.

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