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Followup To
Question -
Yes, I redo all the A/C compodents. dryer, expansion, core...and reinstalled the seal on the quick disconnect. Everything was working good for two days.. the thrid day the car is blowing warm air... can it be a fuse or please advise.
Javier
Answer -
Hi Javier,
I'm not a real expert on A/C but if the compressor clutch is not engaging then you have to first determine whether you have lost enough refrigerant due to a leak such that the safety switch that shuts off the clutch relay has been activated. If your system doesn't have a sight glass then you have to hook up a pressure gauge to see how the system pressure is reading. If the compressor clutch is engaging, then the most common reason for no cool air is that the mode door in the cabin air control unit is not positioned to send air over the cooling coil and instead is by-passing it. I suspect the refrigerant leak is more likely. If you want some help identifying the wires, etc. tell me the year and model of the car you are driving.
Roland
The car is a 1999 chrysler seabring jxi...
AnswerHi Javier,
I have to use a Cirrus manual for the wiring diagrams but the Sebring should be identical. The compressor clutch is powered by a 40 amp fuse located in the power distribution center under the hood (a long recectangular box next to the battery). So look at all the 40 amp fuses.
The refrigerant pressure in the system is measured by the pressure transducer which is in the low pressure return line near the compressor. It has a 3 wire connector and it sends a voltage to the powertrain controller that says whether the pressure is good enough to operate the compressor without damage. If it does the controller grounds the dark blue/orange wire of the compressor relay to close the relay an activate the clutch. The power for the activation of the clutch relay comes from a 10 amp fuse in the power distribution center. So check all the 10 amp fuses in that box.
If all the fuses check and the pressure transducer is plugged in, then you have to see if the pressure is really o.k. by reading it with a gauge. If the pressure is o.k. but the clutch won't engage then I would try grounding the dark blue/orange wire at the compressor relay which will close the contacts and should cause the compressor to run. See if that makes cold air and if it does then I would suspect the pressure transducer is bad.
So work along those lines to figure out what is wrong.
Roland
