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Power Strokes
6.4 Aftermarket
A/C expert needed.
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[QUOTE="Mixedbreed, post: 1012982, member: 6012"] Check the pressure with nothing on and the system in a stable state. Should be close to the same as ambient temp. The pressures should be the same on high and low side when the system is completely off and it's been stable for a while. there's no reason the low-pressure side should be that high unless there is a blockage somewhere but the blockage would be in the Evaporator. any other symptoms that you can talk about? The only other thing I can think of but it really doesn't seem feasible is your receiver drier desiccant bag exploded and put non-compressible's in the system but that would even be a highside failure because the AC system is high from the compressor to the thermal expansion valve and low after the valve to the inlet of the compressor Like it was asked before, does the compressor cycle normally? Even if the compressor is bad the low side should never get in the danger zone because there's nothing to raise the pressures in the system. Do the fans turn on when the ACs kicked on? [/QUOTE]
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