Engine Size: 5.3
Refrigerant Type: r134a
Ambient Temp: 90
Pressure Low: high
Pressure High: low
Country of Origin: United States
Im having trouble with ac system in my truck. Its showing that my low side has a high pressure and my high side has a low pressure. What can cause this problem?
What are the actual pressures. Are you using a/c service gauges to preform your diagnostic? What is your procedure for determining these pressures. aka idle, engine off or high idle?
Yes im using the ac service gauges to check the pressure. On the low it the needle is going past the reading pressures and on the high its showing around 150. i had the car running with the ac on all the way. Is there any way to level them?
When you say 'the low needle ... is going past the reading pressures' do you mean that it is going past the Zero point? If so, your compressor is working pretty good. It just needs some refrigerant and a new LPCO switch.
If the compressor can pull a vacuum on the low side, your LPCO switch it defective, and you are running the compressor with little to no lubrication. Generally the low will occur when there is insufficient refrigerant to boil in the evaporator and absorb the heat from inside the car/truck, and the compressor keeps pulling from the evaporator. The LPCO should cut the compressor off when the evaporator gets a bit below 32F, the freezing point of H2O, so as to not frost up the evaporator.
If I have not understood your gauge readings, please clear up what you mean.
simplificate and add lightness
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