Why is my AC system freezing up?

There are many reasons why your AC system freezes up.

Double-checking the air filter isn’t dusty and airflow isn’t restricted are the only tasks you can safely fix without professional help. If you need to put in a new the filter, you can speed up the defrosting process by turning off the system and using the fan. If you have a heat pump, you can turn it to heat mode until the ice has disappeared.

After the ice is gone, turn settings back to normal. If your unit freezes repeatedly, call Service Experts Heating & Air Conditioning to fix the malfunction.

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

Not enough refrigerant—A frozen system may be a result of a refrigerant leak.

What causes a leak?

  • Weak solder joints
  • Friction from piping vibrating against other components
  • Broken valves
  • Loose fittings

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

Filthy evaporator coil—Throughout the seasons, the evaporator coil attracts dirt and causes problems similar to a clogged filter. You’ll gradually get lower airflow until your equipment freezes or stops cooling. You’ll need to get in touch with Service Experts Heating & Air Conditioning to fix the issue.

Defective blower motor or relay—A blower motor going at an incorrect speed or not working at all can result in freezing. It may also be irregular, running at maximum speed and going slower after it heats up. Or a relay could make it start one time and not the next. In either situation, you will need to get in touch with Service Experts Heating & Air Conditioning to repair the trouble.

Booking regular AC maintenance might help you bypass this problem. Our technicians will comprehensively check and clean your equipment, which usually allows us to locate minor troubles before they turn into huge issues.