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 A/C pressure?

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Mikel
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Name : Mikel
Age : 46
Location : New Haven, CT
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A/C pressure? Empty
PostSubject: A/C pressure?   A/C pressure? EmptySun Aug 30, 2009 4:00 pm

Hello,
I just recharged the A/C in my friend's 98 Riviera. The compressor wasn't turning on. I added some R134A and the compressor is now spinning. We got some cold air for a brief time (low pressure line was very cold), but now while it is still spinning, the low pressure line is not cold and there are no signs of cold air anywhere. The low pressure side port reads about 35 PSI with the compressor turning.
Any ideas?
Thanks,
Mikel
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Rickw
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Name : Rick
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A/C pressure? Empty
PostSubject: Re: A/C pressure?   A/C pressure? EmptySun Aug 30, 2009 4:31 pm

What about the High Pressure side?
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Mikel
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Name : Mikel
Age : 46
Location : New Haven, CT
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A/C pressure? Empty
PostSubject: Re: A/C pressure?   A/C pressure? EmptySun Aug 30, 2009 5:07 pm

Rickw wrote:
What about the High Pressure side?

The cheap can with gauge I bought doesn't have a fitting that fits the high side frown
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Rickw
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Name : Rick
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A/C pressure? Empty
PostSubject: Re: A/C pressure?   A/C pressure? EmptySun Aug 30, 2009 5:40 pm

Can't do much diagnosis without knowing both Low and High side pressure.
If you don't have an A/C gage set up for R-134 you might want to have a shop put some gauges on it and see what's up.
Although if you want to add valuable diagnostic tool to your toolbox it would be worth having even an inexpensive gauge set-up.
I still have the set I bought over 20 years ago for R-12 and adapted it for R-134, worth having in my opinion.
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Mikel
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Name : Mikel
Age : 46
Location : New Haven, CT
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A/C pressure? Empty
PostSubject: Re: A/C pressure?   A/C pressure? EmptySun Aug 30, 2009 7:20 pm

I might be able to borrow one... Thanks.

Rickw wrote:
Can't do much diagnosis without knowing both Low and High side pressure.
If you don't have an A/C gage set up for R-134 you might want to have a shop put some gauges on it and see what's up.
Although if you want to add valuable diagnostic tool to your toolbox it would be worth having even an inexpensive gauge set-up.
I still have the set I bought over 20 years ago for R-12 and adapted it for R-134, worth having in my opinion.
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woggy
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woggy


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A/C pressure? Empty
PostSubject: Re: A/C pressure?   A/C pressure? EmptyMon Aug 31, 2009 10:20 am

more than likely the pressure in the high side is way too high, over 250psi. If thats the case replace the orfice tube. this is a very common problem.
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Mikel
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Name : Mikel
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A/C pressure? Empty
PostSubject: Re: A/C pressure?   A/C pressure? EmptyMon Aug 31, 2009 10:55 am

woggy wrote:
more than likely the pressure in the high side is way too high, over 250psi. If thats the case replace the orfice tube. this is a very common problem.

The compressor does kick in, meaning that a minimum of pressure is there, so some cooling should be taking place. I'll try to get some gauges to confirm. Thank you.
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