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07-03-2016, 11:27 AM
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#1 |
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Registered User
Join Date: Feb 2011
Location: Baileyville, ks
Posts: 29
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1972 cheyenne AC problems
Finally doing the final touches on my truck. Charged the AC system yesterday and it blows cold... but.. the compressor is not cycling on and off like it should and high side pressure is getting way too high. What could be causing this?
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07-03-2016, 02:21 PM
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#2 | |
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Registered User
Join Date: Mar 2001
Location: Paradise TX USA
Posts: 1,200
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Re: 1972 cheyenne AC problems
Quote:
__________________
"Negative people always seem to have a problem for every solution" |
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07-03-2016, 07:52 PM
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#3 |
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Registered User
Join Date: Feb 2011
Location: Baileyville, ks
Posts: 29
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Re: 1972 cheyenne AC problems
It's an original system with upgrade to 134A. Everything was replaced but the POA VALVE. Do I need to update it to the new style with switch?
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07-03-2016, 08:15 PM
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#4 | |
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Registered User
Join Date: Mar 2001
Location: Paradise TX USA
Posts: 1,200
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Re: 1972 cheyenne AC problems
Quote:
How high is your high side pressure running? R134 systems normally run higher pressures than with R12.
__________________
"Negative people always seem to have a problem for every solution" |
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07-04-2016, 02:51 AM
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#5 |
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Registered User
Join Date: Jul 2015
Location: Euless, Tx
Posts: 431
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Re: 1972 cheyenne AC problems
Yes you want to recalibrate the poa valve.
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07-04-2016, 07:54 AM
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#6 |
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Registered User
Join Date: Feb 2011
Location: Baileyville, ks
Posts: 29
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Re: 1972 cheyenne AC problems
Thanks, will do
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