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Why Is My HVAC System Freezing Up?

Technician meeting with homeowner by hvac system

HVAC residential services come across frozen equipment from time to time—like an A/C unit that looks curiously similar to a snow cone. Although they’re quite a sight to see (and a photo might get you some Facebook Likes on your profile), you may quickly realize how un-fun it is to have a frozen HVAC system.

On the topic of residential services, here are three reasons why your HVAC system is freezing up:

1. Airflow Restriction

Although there are a variety of reasons why your system might have restricted airflow, the most common cause is a dirty air filter. A clogged or dirty air filter is the common denominator among many frozen HVAC systems.

2. Low Refrigerant

Low refrigerant will lead to an over-cool environment, leaving condensation all over the system like goosebumps. The water droplets then freeze, and you’re left with a second freezer outside your home.

3. Dirty Evaporator Coils

When your evaporator coils are dirty, it creates an environment for restricted airflow leading to cooler than normal temperatures in your HVAC system. Combine dirty evaporator coils with a dirty air filter and you got yourself an icicle.

So the next time you step outside your home to an HVAC ice cream sandwich, you’ll know why it happened!

Call us here at Brummitt Heating & Cooling if you discover your system is frozen. We can help! Our residential services are designed to provide you with the best preventative maintenance to stave off frozen HVAC systems; schedule an appointment with us today.