Why is my AC system freezing up?

There are many reasons why your AC system freezes up.

Making sure the air filter isn’t clogged and airflow isn’t restricted are the only tasks you can safely fix yourself. If you need to replace the filter, you can hasten the defrosting process by disabling the system and switching on the fan. If you have a heat pump, you can turn it to heat mode until the ice has melted.

After the ice disappears, turn the temp back to normal. If your unit freezes a second time, call Aramendia Plumbing, Heating and Air to correct the problem.

Here are a few other reasons why your equipment could be freezing up.

Not enough refrigerant—Freezing could be a result of a refrigerant leak.

What creates a leak?

  • Fragile solder joints
  • Grating from piping jarring against something
  • Broken valves
  • Unsecured fittings

How long your equipment has been installed and the location of the leak play a role in whether you should repair or replace your AC system.

Filthy evaporator coil—Over time, the evaporator coil gets dirty and leads to troubles similar to a dusty filter. You’ll progressively lose airflow until your unit freezes or quits cooling. You’ll need to call Aramendia Plumbing, Heating and Air to fix the problem.

Malfunctioning blower motor or relay—A blower motor running at an incorrect speed or not running at all can lead to freezing. It might also be sporadic, going at full speed and decelerating after it gets warm. Or a relay may make it run one time and not the following time. In either case, you will need to get in touch with Aramendia Plumbing, Heating and Air to correct the problem.

Scheduling annual AC maintenance can help you skip this issue. Our technicians will comprehensively examine and clean your system, which typically allows us to catch little troubles before they become major problems.