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cmedin6 on Sun June 21, 2009 10:44 PM User is offlineView users profile

Year: 1997
Model: E320
Refrigerant Type: 134
Ambient Temp: 100
Pressure Low: 100
Pressure High: 100
Country of Origin: United States

A friend asked to check out his A/C. hE HAS NO POWER AT CLUTCH AND DRIER PRESSURE SWITCHES HAVE VOLTAGE. Is there a cycling switch or a low pressure switch on these that cound go open and not let the circuit complete. The Dealership wants $2200 for a compressor kit and I dont think its a compressor problem because if you disconnect the lines and turn the clutch manually it has suction and discharge. It does compress. No leaks. So I think its a switch that I don't know about or cant find. I think electrical problem and not compressor problem. Please help. Dont want to see this guy get ripped off.

Carlos Medina

Chick on Mon June 22, 2009 6:48 AM User is offlineView users profile

You may need to invest is a service manual to check the electrical system, some need a scan tool to reset codes, could be a relay, some have separate compressor fuses, but I agree, a second opinion is needed..

Email: Chick


Freedoms just another word for nothing left to lose

HVargas on Mon June 22, 2009 1:00 PM User is offlineView users profile

Definitely sounds like an electrical issue. Your static pressure is more than enough to cycle on the compressor. To ensure everything is working you can always use a jumper to go from the battery to the compressor to make sure everything is working properly and the system is cooling. Then trace back the problem. Your best bet may be to subscribe to Alldata or Mitchell On-Demand. Will run you about the same price as a manual and has LOADS of information if you have some basic knowledge and can understand a wiring diagram. If not I would take it to a professional.


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