A/C not coming on


Old 06-07-05, 06:38 PM
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A/C not coming on

I have a 1994 GMC Jimmy. I'm pretty sure the system is charged. It worked last season. I'm noticing though that when I turn on the A/C, the clutch on the compressor isn't moving. Could it be low on refrigerant? Or is it an electrical problem. I checked the fuse and it's ok. I was thinking of getting a can of Freeze 12 and adding it to see if it kicked on.
Any Suggestions?
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Old 06-07-05, 06:53 PM
Join Date: Jun 2002
Location: Long Island, NY
Posts: 1,531
I was thinking of getting a can of Freeze 12 and adding it to see if it kicked on.
Bad move

Put a set of gauges on and see what the pressures are.
Old 06-07-05, 07:39 PM
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Join Date: Jan 2001
Location: Kansas City, Missouri.
Posts: 1,172
A quick check could be to bypass the low pressure switch for just 1 second. If the compressor kicks in, then you are low on refrigerent. Don't run the compressor with the switch bypassed or you will be buying a new compressor and $60 belt.
Old 02-27-07, 12:53 PM
Join Date: Feb 2007
Posts: 87
The most likely cause of your ac not working is that you have lost freon coming out from your compressor. If your compressor looks all wet and oily you have found your prob.

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