DanG144
Top Post Dawg
You verify that you have the right amount of refrigerant. It is installed by weight. The only way to be sure is to remove the charge, then insert the proper weight.
Then verify the clutch is working.
Then check system pressures. If the high pressure is too low, and the low pressure is too high, the compressor is not pumping OR the Thermal Expansion valve is stuck wide open. It is essentially impossible to tell the difference in these two failures, which is why most professionals always replace the TXV and the compressor, and the drier.
You can also verify that your filter drier is not plugged up by checking the temperature of the pipe before it and after it. The temperature should be the same. If it is cold and sweating downstream of the drier, then the drier is plugged up. If the drier is plugged up (on the Mk IV) then you would have normal suction pressure and low high pressure (since the high pressure gauge is hooked up downstream of the drier.)
Then verify the clutch is working.
Then check system pressures. If the high pressure is too low, and the low pressure is too high, the compressor is not pumping OR the Thermal Expansion valve is stuck wide open. It is essentially impossible to tell the difference in these two failures, which is why most professionals always replace the TXV and the compressor, and the drier.
You can also verify that your filter drier is not plugged up by checking the temperature of the pipe before it and after it. The temperature should be the same. If it is cold and sweating downstream of the drier, then the drier is plugged up. If the drier is plugged up (on the Mk IV) then you would have normal suction pressure and low high pressure (since the high pressure gauge is hooked up downstream of the drier.)