2003 Chev 2500HD diesel with auto dual hvac control. No a/c clutch engagement with a/c, intermittent engagement with defrost. Low pressure SW shorted - no affect. Fuses & a/c relay ok. When a/c clutch jumpered, only small amount of Freon enters system - low pressure line prior to evaporator frosts up (33 degrees) so some fluid is entering but not much - Freon can not cold. Static pressure showed 60 psi on both high and low side with the amount of Freon in the system. Blower motor works for all speeds. A/C indicator lite on, temp set to 60 degrees. Both defrost and a/c blow warm, ambient air into truck. Almost acts like a blockage somewhere, but some Freon must be entering to have frosted low pressure line prior to evaporate.
What makes this problem better or worse?
Truck drives and ides Normally
How long has your 2003 Chevrolet Silverado 2500 HD had this problem?
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Need high and low side readings with compressor engaged (jumpered) - - refrigerant dispenser valve CLOSED.