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2005 Pontiac Sunfire - A/C not cooling consistently

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New User

Sep 22, 2016, 9:22 AM

Post #1 of 2 (524 views)
2005 Pontiac Sunfire - A/C not cooling consistently Sign In

I have a 2005 Pontiac Sunfire, and the A/C has recently stopped cooling consistently. The car has about 109K miles on it. When the A/C is cooling normally, nothing unusual happens with the car. When the A/C is on but not cooling, I notice that my RPMs while idling jump up every 6 or 7 seconds before dropping back down to normal RPMs for my car while idling. Sometimes, I can turn off the cooling button on the A/C interface and then turn it back on to make the cooling kick in, but this doesn't work every time. Any thoughts on the problem with my A/C?

Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Sep 22, 2016, 10:13 AM

Post #2 of 2 (518 views)
Re: 2005 Pontiac Sunfire - A/C not cooling consistently Sign In

It's probably doing that because the compressor is cycling on and off.

Have the system evacuated and recharged with the proper weighed charge and see what it does.


We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.

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