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What Causes an Air Conditioner to Freeze Up?

  • October 2013
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One of the worst moments as a homeowner is realizing your air conditioner isn’t working on a hot, unpleasant day. It’s even more confusing when you find out the unit has frozen over in the Indiana heat. There are many reasons why this happens and this guide provides a better answer to the common question: What causes an air conditioner to freeze up?

  • One of the most common reasons why your air conditioner might freeze up is that it’s low on refrigerant. If this is the case, it is a fix that a technician can do easily.
  • There might not be a good airflow going through to the air conditioner’s cold coil. Filters oftentimes need to be replaced or cleaned if this is the case.
  • Another common problem that may arise is the air conditioning unit’s fan is not moving when it should. This is another easy fix that can be done by an HVAC professional.
  • If you let the A/C run throughout the night when temperatures are lower, this too can cause a freeze in the unit.
  • Finally, if the coil does freeze up but the unit is still running and continues to run long after that, this will make the freeze build up and even ruin the air conditioner’s compressor. This is one of the last things you would want to do, as it is an expensive repair.

Knowing what causes an air conditioner to freeze up allows you to understand what’s going on and how to respond accordingly. All HVAC technicians offer many services that help with everything mentioned above, ensuring your unit is running at its best.

If you’re experiencing air conditioner freeze up, immediately contact Meyer’s for answers or to set up an appointment.