the ac compressor good, fan good switch panel good heater good but the ac not coming on

Asked by Sep 04, 2013 at 05:47 AM about the 2004 Toyota Wish

Question type: Maintenance & Repair

The ac compressor in my 2004 Toyota Wish 2000cc is not coming on despite the switch light up on the dashboard  the fan works to regulate the temperature, but do not come on when you turn on the ac. the heater blows hot air. when turn on. the blower fans works.  the compressor will work when test independently.  gas was changed to accommodate a different pressure switch in front of the radiator/condenser . what could cause the ac from not working?  the engine was repaired after a blown cylinder head gasket.  difficulty in restarting. computer was removed and put back. now driving but no ac. grateful for your help

3 Answers


the different pressure switch may be it, the system needs a certain amount of pressure to energize the front clutch on the compressor to turn the compressor on pump mode spinning

2 of 2 people found this helpful.

also, may just need more r134 pumped in, maybe leaking out slowly

1 of 1 people found this helpful.
Best Answer

thanks but the pressure switch was changed because i assumed the previous one was bad and its not leaking. i believe it more electrical related

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