Toyota Corolla A/C Not Working

Peter’s question:

I have Toyota Corolla 2003. Two days ago A/C stop working. A/C compressor clutch does not works at all and no power there. Blow motor works, but there is only a hot air. A/C switch light in the car works also. I assume the A/C system has enough freon. According to me it is an electric problem, but your opinion is more important. Thank you for the advice. Regards, Peter”

Answer:

Never assume anything with an AC system. If the refrigerant is low, then the pressure switch will tell the AC computer and it will shut off power to the compressor. SO, it’s best to put a set of AC gauges on the system and hot wire the AC clutch to see if it comes on. If it comes on and the pressures are too low, then odds are you’re just low on refrigerant. Evacuate the system and add a factory load of refrigerant and a little UV AC dye to see if the leak is big or small. All ac systems leak somewhat due to their rubber seal format–if the seals didn’t leak, then oil couldn’t lubricate them, and they would burn out and then would leak big time. Now if the AC comes on when you hot wire it, and the pressures are fine and it blows really cold, then yes, you’d have an electrical problem somewhere. But, that’s pretty rare in a Corolla unless it’s been wrecked.


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