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Why does a car AC go cold then warm?

My car’s temperature has been so inconsistent lately. Can you tell me why a car AC goes cold then warm?

avatar
Melanie Mergen · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
There could be several reasons your car’s AC goes cold then warm; a few possible culprits include:
  • Overcharged refrigerant
  • Excess moisture in the AC system
  • AC system leak
  • Blocked valve or pipe
  • Faulty expansion valve
  • Faulty sensors
  • Faulty compressor clutch
  • Blown fuse
  • Wiring issues
The best way to find out why your car’s AC goes cold then warm is to have a mechanic look at your car’s air conditioning system.
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