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Why is there an Ice Buildup on my Air Conditioner?

Finding an ice buildup on an air conditioner is not uncommon. It is a sign that there is a problem in the system. You’ll need to arrange for a service call to find out the exact reason why you have ice on and inside your air conditioner.

Possible Causes of an Ice Buildup on your Air Conditioner

Some common reasons why you may see ice forming on your air conditioner include:

Low Coolant Level

If your coolant level is too low, the coils will be at lower temperature than normal. The excess condensation builds up and becomes ice.

Fan Issues

The evaporator unit’s fan is supposed to keep the coil temperature above the freezing point so that the condensation on the coils will not freeze. If the fan spins too slowly or not at all, the temperature will drop and the buildup in condensation will freeze.


Debris in the evaporator unit can restrict the air flow to the coils, which will result in fan problems.

Troubleshooting Tips for ice Buildup on an Air Conditioner

If you notice ice buildup on and inside your air conditioner, here are a few things you can try:

  • Adjust the temperature setting on the thermostat so that it is no more than 18 degrees cooler than the outdoor temperature. You may be seeing ice because your air conditioner is being overworked.
  • Run the air conditioner system in fan-only mode for several hours. This will allow the ice to melt.
  • Remove any debris from around the condenser unit and evaporator unit.
  • Clean the air filter or replace it to improve air flow through the house.

Regular inspections can lower the risk that you will have to deal with an ice buildup on your air conditioner. Call Air Depot to schedule a maintenance inspection or all your air conditioning service needs.


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