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compressor turns off after one cycle

philso on Mon June 21, 2010 7:54 PM User is offline

Year: 2001
Make: Dodge
Model: Ram 1500
Engine Size: 5.9
Refrigerant Type: 134A
Ambient Temp: 95
Country of Origin: United States

My AC quit working. I took it to an AC service shop for a free checkup and was told the refrigerant was gone... all of it. They refilled it and charged $110. The compressor now runs for one cycle and then shuts off and won't come back on. When I took it back to the shop I was told the engine fan clutch was bad and was not cooling the condenser properly this was in turn not allowing the AC to run.
Does this make sense or could there be some other problem?
The engine runs at normal temperature, it does not overheat and the fan is visibly turning although I don't know if it is turning as fast as it should.

TRB on Mon June 21, 2010 10:12 PM User is offlineView users profile

If you were out of refrigerant and all they did was charge it back up! Good chance you just wasted $110.00 dollars. If the fan clutch is bad you could be shutting down on a high pressure issue. You could even lose all your refrigerant if you compressor has a blow off valve but the system is design to shut down before that happens. SO w/O any pressure readings and a history of loss of refrigerant. I would assume you are already low on refrigerant and the system is shutting down as it is designed. Now if you are still full of refrigerant you very well could be shutting down do to a pressure issue. See if the shop will provide pressure readings as idle & 1500 rpm.


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Briandl79 on Tue June 22, 2010 1:47 AM User is offline

Story seems to be missing something. When they charged it, didn't they check to make sure it worked? Didn't it work when you drove it home? If it did how long before it stopped working? If it did work for a while and then stopped you probably have a leak and once it leaked out and got too low, the compressor stopped engaging to protect itself, and you were back to square one.

If it never did work that's not a very good shop, but their diagnosis *might* be correct. I'm no expert but I hear you can spray cold water over the condenser while checking the temps to see if they come down, if they do it may very well be the fan.

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