Key Reasons Why Your AC Is Freezing Up

Frozen AC hose

Is your air conditioner freezing up? This problem often takes homeowners by surprise because they don’t have the knowledge about their AC units to understand what’s happening. However, this is a very common problem during the hottest days of summer. To get this problem fixed fast, you need External link opens in new tab or windowemergency ac repair in Montgomery, TX. Keep reading to learn more about what causes air-conditioning units to freeze up.

Blocked Airflow

Humidity that settles on the air-conditioning coils will cause a freezing effect. This happens when airflow is hindered. To keep the air flowing through the house from disturbing your AC’s functionality, you need to make sure your unit’s filter isn’t clogged. Dirty filters cause a lot of headaches for homeowners and contribute to several AC problems because airflow gets restricted. The good news is that filter problems are easy to fix. Air filters are cheap and very easy to replace.

Mechanical Problems

Your air conditioner might look like a simple metal contraption, but inside there are many moving parts that can get clogged, broken, or otherwise damaged. If refrigerant lines get kinked or fans stop moving, air-conditioning units can freeze.

 Refrigerant Levels

In order for your AC unit to cool your home, it has to have optimal refrigerant levels. When the levels get too low, the unit can appear to freeze up. If you have a coolant leak, call for air-conditioning repair service. This isn’t an issue you can solve yourself.


It’s also important to note that constant leaks are a sign of further damage to the unit. In cases like this, you need to have a serious conversation with your air-conditioning technician. You might need to prepare to invest in a new unit.


Technician adding refrigerant

Cool Nights

You might look forward to cool Texas nights during the summer, but these nights can cause your AC to freeze. Air conditioners are built to operate within optimal temperature thresholds. Any drastic change in outdoor temperatures can throw your system out of whack. When it’s 90 degrees during the day and the temperature drops off into the 60s at night, this can affect your AC’s performance.


You can fix this problem by turning the AC off when temperatures dip at night. If you’re not able to remember to turn off the AC, consider installing a programmable thermostat. Program the thermostat to turn off at night when outdoor temperatures are expected to fall.

Signs Your AC Is Freezing Up

Not sure if you have a freezing problem? There are some ways to check that are easy for homeowners to do. First, check the supply registers. Is the air coming out of the register warm when the AC is running? This is a sign that your unit is freezing up.


Another sign of freezing is leaks around the air handler. This is the part of your air conditioner that’s inside the home. If you see a leak, check your filter. Is it dirty? Replace it, clean up the leak, and see if it returns. If it does, call for service.


The best way to prevent freezing is to stick with an air conditioner maintenance plan that includes regular filter changes and tune-ups from your local AC service. If you’re concerned about freezing, call Bear AC & Heating at (936) 231-4064 for External link opens in new tab or windowac repair in Montgomery, TX.