1999 Silverado AC issues

enrique69

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Ac in my truck is not cooling properly. Both schrader valves are leaking. I know this because i removed the caps and sprayed the valves with soapy water. I have one of those guns with a dial to dispense refrigerant, when the compressor is off the pressure goes into the red. When it kicks on, refrigerant level goes below the green zone. Seems to me there is more than low refrigerant going on. Any thoughts?
Hope this makes sense and thanks in advance
 

zora

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The gun is attached to the low side so with the engine off it will not give you the correct reading. I believe the instructions state not to hook up until the engine is started?
 
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