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I have a 2002 trailblazer and the air conditioning worked on some of the settings but not all, and now doesn't work on any. I can feel a bit of cool coming from the vents but it seems like the fan, or whatever it is isn't blowing. thank you!
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There is an actuator on that side. Pull the plug and put it back in, see if it works. If not, then you will need a wiring schematic to check for power and ground. If both are there, replace the actuator.
Problem could be the AC compressor going bad, or more likely, the throttle body needs to be cleaned thoroughly front back sides. Also, the PCM (computer) needs to be reset to allow it to relearn to the newly cleaned TB.
Multi-Diag Access J2534 has the function for air condition, such as Diagnosis of cooling electronic, Reading settings cooling circuit,Test servo actuators http://www.careucar.com/wholesale/[email protected]
If the freon is full and the compressor clutch is working,is the blower working, need more details, if it is, you could have a blocked orifice filter. or a bad high pressure switch located at the rear of the compressor.if the high pressure switch loses voltage or goes out, your cool air will come to a dead halt. check the high pressure switch for voltage. good luck!
There is a switch that works the computer upon turning on the air conditioning. Upon turning the AC on the switch sends a signal to the computer to increase the RPM's to the engine so it will not die out
Service Engine Soon (SES) or Check Engine Light On, DTC P0480, P0526/P1481/P1484 Set (Replace Engine Cooling Fan Wiring Harness) #05-06-02-012B - (10/19/2006)
Some customers may comment that the Service Engine Soon (SES) or Check Engine light is illuminated. This condition may be intermittent and upon investigation, the technician may find either DTC P0480, P0526, P1481 or P1484 set.
This condition may be caused by the cooling fan harness chaffing against the plastic guide it routes through. This contact may damage the insulation of the wires enclosed in that harness.
Replace the wire harness:
Part Number 89024920 Description Harness Assembly, Engine Cooling Fan Wiring
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