Compressor quick cycling
#1
Compressor quick cycling
My A/C had a loose connector that was weeping refrigerant over the course of a year. I've tightened it and added R-134a to bring it back up to level, but the compressors spins for a half a second, my pressure drops to 25 and the compressors kicks off....pressure builds, hits 45 and repeats....lasts for half a second and when the pressure goes below 25, the compressor shuts off. I have plenty of air flow and refrigerant. Maybe I need PAG oil??
#2
#4
You need to evacuate the system, verify no leak and then recharge based on the amount required on the sticker under the hood.
If this is a 2008 or older, I would also replace the fixed orifice valve while the system is evacuated.
DO NOT USE ANY OF THAT LEAK STOP STUFF!
If this is a 2008 or older, I would also replace the fixed orifice valve while the system is evacuated.
DO NOT USE ANY OF THAT LEAK STOP STUFF!
Last edited by digitaltrucker; 10-07-2014 at 07:30 AM.
#5
#6
The only way to be sure you are charged per specs is to reclaim and recharge by weighing in or use of expensive machine that measures.
#7
Add another can of Freon. The amount of charge is determined by the difference of pressure between the high pressure and low pressure and ambient temperature.
YOur problem is the low pressure switch kicking it out. You don't have a blockage unless the high pressure line is going about 300 on a warm day (about 80" or so).
Just a general rule you need about 30# on the low pressure line at 2000 rpm. That is if you are not checking the high side. With it kicking out on the low pressure switch, another can of freon is not going to hurt it.
YOur problem is the low pressure switch kicking it out. You don't have a blockage unless the high pressure line is going about 300 on a warm day (about 80" or so).
Just a general rule you need about 30# on the low pressure line at 2000 rpm. That is if you are not checking the high side. With it kicking out on the low pressure switch, another can of freon is not going to hurt it.
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#8
if he wants a correct charge as required by the manufacture he does. There is no way you can tell , exactly, by attaching gauges whether you have: 1.0 lb, 1.2lb or 1.5lb or more.
The only way to be sure you are charged per specs is to reclaim and recharge by weighing in or use of expensive machine that measures.
The only way to be sure you are charged per specs is to reclaim and recharge by weighing in or use of expensive machine that measures.
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