Why is my AC system freezing up?

There are lots of reasons why your AC system freezes up.

Double-checking the air filter isn’t dirty and airflow isn’t restricted are the only tasks you can safely fix yourself. If you need to install a new the filter, you can accelerate the thawing process by turning off the equipment and turning on the fan. If you have a heat pump, you can turn it to heat mode until the ice has melted.

After the ice is gone, switch the temp back to normal. If your system freezes again, get in touch with McKinley Heating Service Experts to take care of the issue.

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

Low refrigerant—Freezing can be a result of a refrigerant leak.

What causes a leak?

  • Fragile solder joints
  • Grating from piping rubbing against an object
  • Cracked valves
  • Slack fittings

How long your equipment has been working and the location of the leak determine whether you should repair or replace your AC system.

Dirty evaporator coil—As time passes, the evaporator coil gets dirty and leads to problems much like a dirty filter. You’ll progressively receive lower airflow until your unit freezes or quits cooling. You’ll need to call McKinley Heating Service Experts to repair the malfunction.

Malfunctioning blower motor or relay—A blower motor going at an incorrect speed or not turning on at all can create freezing. It can also be sporadic, starting at maximum speed and decelerating after it heats up. Or a relay might force it to run one time and not the next. In either case, you will need to call McKinley Heating Service Experts to correct the problem.

Booking yearly AC maintenance might help you skip this malfunction. Our Experts will meticulously examine and clean your equipment, which often allows us to find minor issues before they turn into large problems.

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