Engine Size: 3.0L
Refrigerant Type: r-134
Ambient Temp: 83
Pressure Low: 45
Pressure High: 250
Country of Origin: United States
A/C system quit abruptly in the last week. @ 82F ambient, static pressure 85. Compressor engages and operates normally. Three condensers, one with electric fan (fan is running). Engine lid closed to pull air thru deck condenser. Evaporator running, outputting air that MIGHT be a little cooler than ambient, but maybe not. Initially, pressures were about 30/150. Added 1/2 can R-134, pressures went to 40-45/250. At evaporator, high side line hot, low side very warm.
System completely revamped 4 years ago and has operated well since then with no problems. Seiko PSV-170 rotary compressor with new seals, new evaporator and expansion valve, two new condensers and one older one thoroughly flushed, and new hoses all around. Converted R-12 to R-134.
I'm thinking the expansion valve is stuck open? Any suggestions for some specific testing that will confirm what the problem might be?
Brian, Chester, VA
Edited: Mon May 03, 2010 at 9:33 PM by CmonRef
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