What is The Reason For My AC Freezing Up?

Know the reasons behind AC freezing up and find quick fixes. Sandium provides expert advice on AC freezing issues. Contact us for a quick fix for ac freezing up.

Updated on Oct 22, 2023
5 min read
What is The Reason For My AC Freezing Up?

You will soon be turning on the air conditioner with summers right around the corner for staying cool and comfortable. Unfortunately, many Bay Area homeowners experience freezing over issues. You may cause irreparable damage to vaarious components by running a frozen AC. You may place unnecessary strain on the unit as well. These are a few reasons why your air conditioner may have frozen up.

1. Airflow is Inadequate

You need to maintain adequate air flow in the system at all times for best results. Humidity can cause coils to freeze quickly. Proper airflow prevents the air conditioner from freezing by keeping the cold coil warm. Warm air is required over the coil to help it remain above freezing temperature. You may unconsciously create inadequate airflow by shutting the supply vents. These vents are responsible for drawing air in the system. The air is cooled and redistributed in the house. Regular maintenance is recommended for preventing airflow issues.

2. Dirty Air Filter

Inadequate airflow may be caused by clogged or dirty air filters. Make sure you check and replace the filters frequently. According to a report by the US Department of Energy, you can improve efficiency in your air conditioner by 5 – 15% with regular replacement or cleaning of air filters. This is a simple DIY task that doesn’t require a trained technician. Dirty air filter may cause the refrigerant in the coil to not absorb enough heat. It helps keep the cycle from freezing over as well.

3. Low Level of Refrigerant

Frozen air conditioner can be the result of low refrigerant levels too. This may cause the coils to become too cold. Low refrigerant level may be the result of a leak. It could also be because the refrigerant was not charged properly. You should get a professional to diagnose this issue and repair it.

4. Drainage Problems

You may have a frozen unit on your hands if there are problems with the condensate drain line drainage. The air conditioner removed humidity by converting it into water form. The condensate drain line is responsible for draining this water. The water may reevaporate if the condensate drain line is clogged. It may build-up and freeze the coil as a result. You need to remember that frozen coils may cause blockage in the drain.

The air conditioner may keep running, but it may not cool the home properly. You may need to pay for high utility bills and extensive bills if you continue running a frozen air conditioner. Frozen coils can cause damage to the compressor as well.

5. Blower Fan is Damaged

The blower fan is responsible for making sure that cooled air enters the home and warm air remains out. The HVAC system should have proper air pressure and airflow if it has to efficiently and effectively condition air and distribute through the house. There are times when the blower may become damaged or break during normal running operation.

Malfunctioning blower fan may cause excessive condensation that builds up on the coils. Further, damaged blower fan may also cause freezing of the refrigerant line without warm air. Frozen refrigerant line may cause further damage to the air conditioner by backing up the condenser.

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