Why is my AC system freezing up?

There are many reasons why your AC system freezes up in Charleston. Nearly all of them typically require professional AC repair.

Double-checking the air filter isn’t dirty and airflow isn’t lowered are the only things you can safely handle without professional help. If you need to replace the filter, you can accelerate the thawing process by switching off the system and switching on the fan. If you have a heat pump, you can turn it to heat mode until the ice has disappeared.

After the ice disappears, move settings back to normal. If your system freezes repeatedly, get in touch with Pardee Service Experts to repair the malfunction.

Here are a few other reasons why your system might be freezing up.

Low refrigerant—Freezing up can be a result of a refrigerant leak.

What causes a leak?

  • Weakened solder joints
  • Friction from piping vibrating against something
  • Cracked valves
  • Loose fittings

How long your equipment has been working and the location of the leak determine whether you should repair or replace your AC system.

Dirty evaporator coil—Throughout the seasons, the evaporator coil gets dirty and causes issues much like a clogged filter. You’ll gradually get lower airflow until your unit freezes or quits cooling. You’ll need to contact Pardee Service Experts to fix the problem.

Broken blower motor or relay—A blower motor working at an incorrect speed or not turning on at all can lead to freezing. It can also be intermittent, going at top speed and slowing down after it gets warm. Or a relay can make it work one time and not the next. In either state, you will need to call Pardee Service Experts to fix the trouble.

Requesting annual AC maintenance or heat pump maintenance may help you avoid this malfunction. Our techs will meticulously check and clean your unit, which typically allows us to locate little troubles before they cause large issues.