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Jumping Pressure Switch
Posted: Mon May 29, 2017 8:12 am
by philipk65
Hi,
I'm trying diagnose my '91 Chevy S-10 R12 issues. I'm waiting on a GM high side adapter to test pressures.
But in the mean time, I jumped to lower pressure switch and the compressor kept running.
What does that indicated?
Thanks Kevin
Re: Jumping Pressure Switch
Posted: Mon May 29, 2017 5:08 pm
by Dougflas
That may indicate that you're trying to ruin your compressor. You need to monitor both lo and hi sides.
Re: Jumping Pressure Switch
Posted: Mon May 29, 2017 6:16 pm
by philipk65
I read online to jump the switch and see if the compressor runs... I did it for 3 seconds.
What does that tell me?
Re: Jumping Pressure Switch
Posted: Mon May 29, 2017 6:18 pm
by philipk65
Like I said before!... I'm waiting on an adapter to test both side.
Re: Jumping Pressure Switch
Posted: Tue May 30, 2017 2:26 am
by Dougflas
Your original post stated that you jumped the switch and compressor kept running. Get both gauges installed and then come back with info.
Re: Jumping Pressure Switch
Posted: Wed Jun 07, 2017 11:13 am
by philipk65
O.K. here are my pressure readings...
at 79 degrees outside temp.
High side- 100 when compressor off and 110 when it runs (on and off ever 3 seconds)
Low side- 94 when the compressor is off and 97 when it runs (on and off ever 3 seconds)
Whats the probable cause for the cycle rapidly?
Thanks!
Re: Jumping Pressure Switch
Posted: Wed Jun 07, 2017 12:53 pm
by Tim
Have you checked for leaks and repaired them?
Re: Jumping Pressure Switch
Posted: Wed Jun 07, 2017 1:18 pm
by philipk65
Yes, no leaks.
I think I misread the gauges before. I checked them again.
low side - 40 (compressor off) 21 (when compressor is on)
high side - 102 (compressor off) 120(when compressor is on)
cycles rapidly....
Re: Jumping Pressure Switch
Posted: Wed Jun 07, 2017 2:37 pm
by bohica2xo
The answer will depend entirely on which engine is in the vehicle.
Re: Jumping Pressure Switch
Posted: Wed Jun 07, 2017 2:55 pm
by philipk65
4.3 L v6