Why is my AC system freezing up?

There are many reasons why your AC system freezes up.

Double-checking the air filter isn’t dirty and airflow isn’t decreased are the only work you can safely fix alone. If you need to replace the filter, you can speed up the defrosting process by disabling the system and turning on the fan. If you have a heat pump, you can move it to heat mode until the ice is gone.

After the ice disappears, switch the temperature back to normal. If your system freezes again, get in touch with Service Experts Heating & Air Conditioning to correct the malfunction.

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

Insufficient refrigerant—A frozen system can be a result of a refrigerant leak.

What leads to a leak?

  • Weakened solder joints
  • Resistance from piping jarring against other components
  • Broken valves
  • Unsecured fittings

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

Filthy evaporator coil—Over time, the evaporator coil gets dirty and creates problems similar to a clogged filter. You’ll gradually lose airflow until your system freezes or halts cooling. You’ll need to contact Service Experts Heating & Air Conditioning to fix the malfunction.

Broken blower motor or relay—A blower motor running at an inaccurate speed or not running at all can lead to freezing. It may also be sporadic, starting at top speed and decelerating after it heats up. Or a relay may force it to work one time and not the next. In either situation, you will need to call Service Experts Heating & Air Conditioning to correct the trouble.

Scheduling regular AC maintenance could help you skip this issue. Our professionals will thoroughly check and clean your system, which frequently allows us to find minor problems before they become major troubles.