Why is my AC system freezing up?

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

Checking the air filter isn’t dirty and airflow isn’t restricted are the only work you can safely take care of alone. If you need to install a new the filter, you can speed up the defrosting process by switching off the unit and turning on the fan. If you have a heat pump, you can move it to heat mode until the ice has melted.

After the ice melts, switch the temp back to normal. If your equipment freezes repeatedly, call Service Experts Heating & Air Conditioning to repair the malfunction.

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

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

What causes a leak?

  • Weakened solder joints
  • Grating from piping vibrating against other parts
  • Ruptured valves
  • Loose fittings

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

Dusty evaporator coil—Throughout the seasons, the evaporator coil gets dirty and leads to troubles resembling a dusty filter. You’ll gradually lose airflow until your equipment freezes or stops cooling. You’ll need to call Service Experts Heating & Air Conditioning to fix the issue.

Broken blower motor or relay—A blower motor going at an incorrect speed or not turning on at all can result in freezing. It might also be sporadic, starting at top speed and going slower after it heats up. Or a relay can make it run one time and not the subsequent time. In either situation, you will need to call Service Experts Heating & Air Conditioning to correct the issue.

Requesting regular AC maintenance may help you bypass this issue. Our techs will comprehensively inspect and clean your equipment, which typically allows us to find little issues before they cause huge problems.