Why is my AC system freezing up?

There are a lot of reasons why your AC system freezes up.

Making sure the air filter isn’t dirty and airflow isn’t decreased are the only things you can safely take care of without professional help. If you need to install a new the filter, you can accelerate the defrosting process by disabling the system and turning on the fan. If you have a heat pump, you can turn it to heat mode until the ice is gone.

After the ice melts, turn the temp back to normal. If your system freezes a second time, contact Comfort Masters Service Experts to take care of the problem.

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

Insufficient refrigerant—A frozen system may be created by a refrigerant leak.

What causes a leak?

  • Fragile solder joints
  • Grating from piping vibrating against an object
  • Cracked valves
  • Unsecured fittings

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

Dirty evaporator coil—Over time, the evaporator coil attracts dirt and leads to troubles similar to a dusty filter. You’ll slowly lose airflow until your system freezes or quits cooling. You’ll need to get in touch with Comfort Masters Service Experts to fix the problem.

Malfunctioning blower motor or relay—A blower motor running at the wrong speed or not running at all can cause freezing. It may also be intermittent, starting at top speed and decelerating after it gets too hot. Or a relay can make it run one time and not the subsequent time. In either state, you will need to call Comfort Masters Service Experts to repair the problem.

Booking regular AC maintenance could help you bypass this problem. Our pros will fully check and clean your equipment, which frequently allows us to catch minor troubles before they become large problems.