Engine Size: 350
Refrigerant Type: 134
Ambient Temp: 85
Pressure Low: 30
Country of Origin: United States
Here is what i have done to this system. new dryer,new exp. valve, o-rings, ester oil,charged 3lbs. 134. heater shutoff valve.my lines on the compressor one hot one is frosty. you would think the a/c would be cold but there is no cold air at the vents! I have checked my blend doors they are working as they should. any suggestions? This is getting very aggrevating. PS the vacuum diaphram at the stv would not hold vac. could this be the problem?
Low and high side pressure readings at idle and 1500 RPM would help the readers.
As Tim mentioned we need both low AND high pressures @ 1,500 RPM.
The vacuum diaphragm on the STV needs to hold vacuum. If it doesn't, it needs to be rebuilt or replaced.
The suction line on an STV system should not ice up on full load. And indication of either a bad STV or low charge.
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