Why is my AC system freezing up?

There are many 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 fix yourself. If you need to put in a new the filter, you can accelerate the defrosting process by switching off the unit 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 disappears, turn the temperature back to normal. If your equipment freezes a second time, contact Service Experts Heating & Air Conditioning to fix the issue.

Here are a couple other other reasons why your equipment may be freezing up.

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

What causes a leak?

  • Weakened solder joints
  • Grating from piping rubbing against something
  • Broken valves
  • Slack fittings

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

Dusty evaporator coil—Over time, the evaporator coil becomes dirty and creates issues resembling a clogged filter. You’ll progressively receive lower airflow until your equipment freezes or halts cooling. You’ll need to contact Service Experts Heating & Air Conditioning to take care of the issue.

Defective blower motor or relay—A blower motor running at the wrong speed or not running at all can lead to freezing. It can also be intermittent, running at top speed and decelerating after it gets warm. Or a relay can force it to work one time and not the following time. In either case, you will need to get in touch with Service Experts Heating & Air Conditioning to correct the problem.

Booking yearly AC maintenance might help you avoid this problem. Our professionals will meticulously check and clean your unit, which often allows us to pinpoint minor issues before they cause huge problems.

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