A/C compressor kicks on and off - The 1947 - Present Chevrolet & GMC Truck Message Board Network

D Stroud · 06-24-2005, 04:35 PM

I can hear (and feel) the A/C compressor kicking on and off when the A/C is runnin on my '85 GMC.

Anybody know what causes this?

Thanks

454HO · 06-24-2005, 04:43 PM

You are probably a little low on freon. When the low side gets below the pressure switch cut-off, the system will shut down. It's short cycling.

79Silv4x4 · 06-24-2005, 04:52 PM

Quote:

Originally Posted by 454HO

You are probably a little low on freon. When the low side gets below the pressure switch cut-off, the system will shut down. It's short cycling.

Sounds about right to me too.

Earl Filter · 06-24-2005, 06:05 PM

Quote:

Originally Posted by D Stroud

I can hear (and feel) the A/C compressor kicking on and off when the A/C is runnin on my '85 GMC.

Anybody know what causes this?

Thanks

How often? It should cycle on and off every few minutes, just not every 4 seconds.

Roberty · 06-25-2005, 01:35 AM

Quote:

Originally Posted by 454HO

You are probably a little low on freon. When the low side gets below the pressure switch cut-off, the system will shut down. It's short cycling.

That's correct. This is a built in safety feature if your AC system is low on freon. Get it charged up and you should be good to go.

D Stroud · 06-27-2005, 10:07 AM

Thanks fellows,

Earl, It cycles more like every 5-10 seconds. I'll get her charged. Sounds like thats probably the problem.

Thanks again!

Dwayne

06-24-2005, 04:35 PM	#1
D Stroud Registered User Join Date: Nov 2004 Location: North Carolina Posts: 18	A/C compressor kicks on and off I can hear (and feel) the A/C compressor kicking on and off when the A/C is runnin on my '85 GMC. Anybody know what causes this? Thanks __________________ Family Chevy Muscle Site

06-24-2005, 04:43 PM	#2
454HO Registered User Join Date: Apr 2005 Location: Austin, TX Posts: 1,224	You are probably a little low on freon. When the low side gets below the pressure switch cut-off, the system will shut down. It's short cycling. __________________ - Greg

06-27-2005, 10:07 AM	#6
D Stroud Registered User Join Date: Nov 2004 Location: North Carolina Posts: 18	Thanks fellows, Earl, It cycles more like every 5-10 seconds. I'll get her charged. Sounds like thats probably the problem. Thanks again! Dwayne __________________ Family Chevy Muscle Site



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