Quote:
Originally Posted by joe_pau
Just had my compressor and receiver drier replaced. While driving, the AC is great. When stopped at a light, the compressor shuts down at 400 psi and the fan never kicks in, and it blows warm air. The mechanic jumped the AC switch and the same thing happened. Is it a relay? What would you look at next? Appreciate the thoughts and ideas.
Other then that the AC works great when the car is moving.
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Quote:
Originally Posted by Whiskeydan
Either there's moisture in the system or it's way overcharged. 400psi on the liquid side is too high even in 100f+ ambient temp here in Texas.
Did you pull a vacuum for at least an hour prior to charging it?
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That's not the problem. If the aux. fan fails to operate at idle to cool the condenser, the high side pressure will continue to rise until the high pressure switch opens causing the compressor to shut off. The other pressure switch on the drier/receiver with the pigtail is what cycles the aux. fan for a/c operation.
08-17-2015, 02:55 PM
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