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Reasons Your AC Unit Is Freezing

This is a common question asked at Gary’s Heating and Air during the summertime. Air conditioners need proper airflow to keep the cold coil warm and without this, the coil will freeze before the condensed water can be drained away from the unit.

Many people think they just need to add refrigerant but there are many reasons why this could be happening.

Reasons Your AC Unit Is Freezing

  • Faulty thermostats
  • Drainage problems
  • Dirty filters
  • Dirty coil
  • Collapsed ductwork
  • Improper sized ductwork
  • Bad blower motor
  • Closed supply vents
  • Return grills covered by drapes, curtains or furniture
  • Refrigerant leak

Important Tips To Keep In Mind

  • Running an air conditioner with frozen coils can lead to extensive damage to the compressor. This is the most expensive part of an AC unit, and it’s not a repair or replacement that you want to face.
  • Don’t settle for someone just coming out and adding refrigerant without providing a full system evaluation of your system.
  • Refrigerant is very expensive and may not be the cause. Adding more refrigerant when it isn’t needed just adds to your problems.
  • Call a certified heating and air conditioner technician to provide a Full System Evaluation so you will know exactly what is causing this.