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On the AC side:

  • Low refrigerant
  • Too much refrigerant
  • Blockage in the system
  • Excess PAG oil
  • Insufficient airflow due to blockage or bent condenser fins
  • Faulty or damaged metering device (thermal expansion valve or orifice tube)
  • Saturated accumulator or receiver-drier
  • Contaminated refrigerant
  • Faulty AC compressor
  • Faulty low pressure switch or circuit fault
  • Faulty high pressure switch or circuit fault
  • Faulty AC compressor clutch relay or circuit fault
On the MVAC side:
  • Faulty ATC/SATC computer or circuit issue (if the vehicle is so equipped)
  • Inoperable blend door
  • Some vehicles use a heater control valve. If this is faulty, it can cause insufficient cooling

AC really isn't a DIY thing. I'd suggest you take it in and let a professional sort it out.

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8y ago

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