3 Grand Master
i attached a manifold gauge set and took some readings on it:
static (after the car was shut off):
high 92
low 93
temperature outside was 89 degrees farenheight.
running (the compressor was engaging for 3 seconds on, 3 seconds off)
high 140-155
low 22-42.
anyone wanna guess.
4 Grand Master
The low and high pressure is right... I am guessing you got too much refrigerant which triggers the high side cutoff when it hits 42 PSI. If you don't mind, let some pressure out when the system is off... let it go down to 85 PSI static.
Low should be rock steady at 28-30 PSI.
Your compressor is working properly.
Big, Big Time Poster
Those numbers are low, especially the high side for such a warm day. This most likely means low freon level. I figure a low side of 35-45 w/ high side of 250-325 is about right...Originally Posted by ryan roopnarine
What did the sight glass look like while the compressor was running? I figure very frothy...on a 'solid' system, it should be solid liquid only.
I take the rad fans were running? Or do they cycle with the compressor? Either way, once you get the system to hold freon, ensure the fan(s) run with the compressor.
Brian
4 Grand Master
Good point about the aux fan... it must be running when AC is switched on.
For R134a, you want the low pressure to be 28 to 30 PSI.
3 Grand Master
1 evacuation and one vacuum later...
system holds between 29-30 inches HG over 17 hours. the drop might be because i disconnected and reconnected everything.
in went one 12oz can of leak detector r134a
1 2/3 can of regular freon (capacity is 32oz/.96kg)
about 90-94 deg f today, it feels cold, but as though something is missing. i only noted that the engine fan came on with the ac, i don't know if there have to be special circumstances for the other fan to come on.
reads 42lb low
and 230 high. don't want to overcharge the thing, because i don't have a refrigerant scale. should i try to fit the other can in?
thanks for your help.
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