Why is my AC system freezing up?

There are a lot of reasons why your AC system freezes up in La Porte. Almost all of them typically need skilled AC repair.

Making sure the air filter isn’t clogged and airflow isn’t decreased are the only things you can safely handle without professional help. If you need to install a new the filter, you can hasten the thawing process by disabling the system and turning on the fan. If you have a heat pump, you can switch it to heat mode until the ice has melted.

After the ice disappears, move the temperature back to normal. If your system freezes again, call Finch Air Conditioning & Heating to repair the issue.

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

Insufficient refrigerant—A frozen system can be caused by a refrigerant leak.

What leads to a leak?

  • Weak solder joints
  • Resistance from piping rubbing against other parts
  • Cracked valves
  • Loose 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.

Filthy evaporator coil—Over time, the evaporator coil attracts dirt and leads to problems much like a clogged filter. You’ll slowly receive lower airflow until your unit freezes or halts cooling. You’ll need to contact Finch Air Conditioning & Heating to take care of the malfunction.

Malfunctioning blower motor or relay—A blower motor going at an incorrect speed or not working at all can cause freezing. It could also be irregular, starting at full speed and slowing down after it gets warm. Or a relay could cause it to start one time and not the next. In either situation, you will need to contact Finch Air Conditioning & Heating to correct the problem.

Scheduling yearly AC maintenance or heat pump maintenance can help you avoid this malfunction. Our techs will fully examine and clean your system, which typically allows us to catch little problems before they cause huge issues.