Why is my AC system freezing up?

There are many reasons why your AC system freezes up.

Checking the air filter isn’t dusty and airflow isn’t lowered are the only things you can safely fix alone. If you need to replace the filter, you can accelerate the thawing process by switching off the unit and turning on the fan. If you have a heat pump, you can switch it to heat mode until the ice is gone.

After the ice is gone, turn the temp back to normal. If your equipment freezes a second time, call D&K Home Services by Enercare to fix the malfunction.

Here are a couple other other reasons why your unit might be freezing up.

Not enough refrigerant—Freezing can be caused by a refrigerant leak.

What leads to a leak?

  • Weak solder joints
  • Grating from piping vibrating against an object
  • Broken valves
  • Loose fittings

How long your system has been working and the spot 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 attracts dirt and creates issues resembling a dirty filter. You’ll gradually get lower airflow until your unit freezes or halts cooling. You’ll need to call D&K Home Services by Enercare to repair the malfunction.

Malfunctioning blower motor or relay—A blower motor working at an incorrect speed or not running at all can cause freezing. It may also be intermittent, going at full speed and slowing down after it heats up. Or a relay can make it work one time and not the next. In either case, you will need to get in touch with D&K Home Services by Enercare to fix the trouble.

Requesting annual AC maintenance can help you avoid this issue. Our techs will fully inspect and clean your system, which frequently allows us to discover small troubles before they become huge problems.