Wednesday, July 28, 2021

3 Things That Could Cause Your AC Unit to Freeze Up and How to Avoid Them

It is hard to imagine how an air conditioning unit could freeze up in the extreme heat of summer.  But it is more common than you think.  At Royal Heating and Air we get requests for HVAC service at the Lake of the Ozarks every summer due to frozen air conditioners.  It is usually because of one of three things, and the good news is … they are avoidable.  We would like to share those three things with you in this blog so you can avoid any inconveniences or unexpected damage due to a frozen AC unit this summer.

1) Improper Airflow.

Your air conditioning unit requires good airflow to function properly.  The way it works is by blowing the hot air in your home over evaporating coils which are cooled by a chemical refrigerant. The refrigerant absorbs that excess heat and, in the process, cools the air which then blows back into your home.  If the airflow is restricted, it can keep enough air from flowing across the coils and they get too cold.  This leads condensation on the coils to turn to ice and freezes up the unit. 

A common cause of lack of airflow is a dirty air filter.  Keeping a clean filter will help maintain proper air flow and help prevent freezing.  Proper air flow also helps improve efficiency, which could help extend the life of your HVAC unit.  Not to mention, a clean air filter helps maintain better indoor air quality.  It is a good idea to check your filter more regularly if you have pets or a home more prone to dust such as one on or near a gravel road.

2) Dusty Coils.

Another reason to check your air filter regularly is to prevent dust from building up on the evaporator coils.  When dust in the air blows over the wet coils it sticks and creates a thick layer of moist residue that blankets the coils and keeps them from exchanging heat from the air into the refrigerant.  This causes the coils to get way too cold and eventually freeze up. 

3) Refrigerant.

If your AC is low on refrigerant, it can have a huge impact on how your system works.  When the pressure is low, the temperature of the refrigerant can drop.  At some point, the hot air is not enough to keep up with the low temperature and the evaporator coil can freeze.

Freezing up is something that can and should be avoided.  It not only could cause you to be without AC temporarily in the heat of the summer, but it might also result in damage to your AC unit and your home.  Sometimes homeowners don’t even realize the AC has frozen until they see the water damage caused to their home after it has frozen and quit working long enough to thaw.

Of course, you can keep an eye on your air filter and your coils yourself, but only a professional HVAC technician at the Lake of the Ozarks should check the refrigerant.  At Royal Heating and Air, when you schedule regular HVAC maintenance at the Lake of the Ozarks, we check all three FOR YOU and more!  Why worry about avoidable damage when you can trust Royal Heating and Air to keep your HVAC in great shape?  After all, we are the king of comfort.

Royal Heating & Air - "The King of Comfort"

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CALL TODAY! (573) 480-4313

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