2002 pontiac sunfire AC compressor.?

[Takarie K]

Does the compressor on my 2002 pontiac sunfire have a electrical connection? i am trying to fix the system. i bought a refridgrent can to refil the system, when i put the blue connector on the pressure jumped up to 120 plus PSI. the compressor does not turn but the fan will turn on. i drained the pressure and the fan turns off, fill it up and the fan turns on. did this several times to make sure. did i damage the system somehow? what could cause the low side to have such high pressure. ? thanks for your time. Autozone.com did not have a pic of the connection, but said some do

 

[wde3477]

There should be an electrical connector to engage the compressor clutch. Don't know that 120psi is out of the norm if it were a moderately warm day - the system has equalized, so the pressures on the high and low sides should be equal. There is a low-pressure cutout at around 20-25 psi that will disable the compressor to prevent damage and to prevent freezing the evaporator. Some vehicles have a high-pressure cutout - so there's at least two reasons the compressor is not working.

You should be able to hear the clutch pull in when the A/C is selected via the climate control panel.

If you're not sure of what you're doing - highly recommend getting professional work done. The high pressures and extreme temperatures associated with the system can cause serious equipment and personal damages - more than enough to offset the savings of doing it yourself.