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1995 air conditioner

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Old Oct 21, 2016 | 03:53 PM
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Default 1995 air conditioner
I have a 1995 C4 that has been garaged here in Florida for the last 6 months I returned a couple of days ago and found that the air conditioner would do nothing but blow hot air. I checked the pressure with a Walmart pressure gauge and it seems fine. I did find that the compressor would engage for about 2 seconds and disengage for 10 - 15 seconds than keep repeating the process, I checked the voltage going to the compressor and it is a constant 13.5 vdc. any help would be appreciated.

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Old Oct 21, 2016 | 04:23 PM
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So the connector for clutch stays at 13.5 volts while compressor cycles on and off?
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Old Oct 21, 2016 | 05:39 PM
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Originally Posted by Kevova
So the connector for clutch stays at 13.5 volts while compressor cycles on and off?
Sorry I missled you by not completing the info.
With the connector to the compressor disconnected there is a constant 13.5 volts. With it connected there is a spike of 12.5 volts to activate the clutch and compressor, and almost immediatetly it drops to 0 and the clutch disengages
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Old Oct 21, 2016 | 07:41 PM
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Low on freon.
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Old Oct 22, 2016 | 10:29 AM
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Originally Posted by antfarmer2
Low on freon.
checked freon, looks good
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Old Oct 22, 2016 | 10:47 AM
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It could be cycling switch you could jump it with a paper clip and see if compressor stays on and air blows cold. I'm not certain of accuracy of Walmart pressure gauge but have connected and to watch low side pressure. cooling fan should come on also.
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Old Oct 22, 2016 | 11:59 AM
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Originally Posted by opaal
checked freon, looks good
No you didn't.
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Old Oct 22, 2016 | 03:27 PM
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Originally Posted by antfarmer2
No you didn't.
O.K. I shorted cycling switch and compressor starting running like a champ , but still blowing warm air. Is it possible my pressure gauge is not working correctly ? and I am low on freon as antfarmer says.
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Old Oct 22, 2016 | 04:00 PM
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Originally Posted by opaal
O.K. I shorted cycling switch and compressor starting running like a champ , but still blowing warm air. Is it possible my pressure gauge is not working correctly ? and I am low on freon as antfarmer says.
Stick a can in it. It will cycle longer and longer then run full and cool one small can should do. Put it on max cool while filling with the windows open. spit in the fill valve I bet it bubbles. Easy fix without loosening freon.
Last edited by antfarmer2; Oct 22, 2016 at 04:04 PM.
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Old Oct 24, 2016 | 09:25 AM
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Originally Posted by antfarmer2
Stick a can in it. It will cycle longer and longer then run full and cool one small can should do. Put it on max cool while filling with the windows open. spit in the fill valve I bet it bubbles. Easy fix without loosening freon.
Antfarmer2, you were right, sorry I doubted you.
Thanks for the info.
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Old Oct 24, 2016 | 11:33 AM
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Originally Posted by opaal
Antfarmer2, you were right, sorry I doubted you.
Thanks for the info.
good job hit my thanks button.
Last edited by antfarmer2; Oct 24, 2016 at 11:35 AM.
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Old Oct 24, 2016 | 01:09 PM
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check for leaks?!
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Old Oct 24, 2016 | 02:13 PM
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Originally Posted by BLUDICE
check for leaks?!
Yes , it was leaking from the low pressure port
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Old Oct 24, 2016 | 02:31 PM
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Originally Posted by opaal
Yes , it was leaking from the low pressure port
If you know a A/C guy he can change the valve without loosening the freon or you can buy the tool and do it yourself or buy a good new cap.
Last edited by antfarmer2; Oct 24, 2016 at 02:38 PM.
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Old Oct 24, 2016 | 09:45 PM
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Here is my set I can change any Schrader valve.
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Old Oct 25, 2016 | 09:25 AM
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Originally Posted by antfarmer2


Here is my set I can change any Schrader valve.
It just needed to be tightened. One can of freon and I was good to go.

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