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AC Frozen Evaporator Coils FAQ's | Ambrose Air Inc.

At first, it might sound like something being frozen in your air conditioning unit is a good thing… right? Unfortunately, frozen evaporator coils will almost always mean that your unit is going to stop working. And in the middle of the summer heat, that’s definitely not a good thing. Let’s take a look at some of the most frequently asked questions we get from our customers who have had this unfortunate experience and needed our Orlando Ac repair services.

First Things First – Just What Exactly is An Evaporator Coil?

All AC units have evaporator coils on the inside. The air conditioner blows air over the coils, which have a refrigerant liquid inside them. The coils then absorb all of the heat from the air passing over them, thus lowering the temperature of the air to make it nice and cold for you.

Why Do Evaporator Coils Freeze?

Have you ever noticed that when you’re running your air conditioner, the air feels a little more dry? That’s because an AC unit will also dehumidify the air as part of its normal operation. Air becoming dehumidified means that it has the moisture “pulled” out of it – and some of this moisture (condensation) can end up on your coils. This is actually quite normal, but in some cases the moisture builds up and doesn’t drain properly, so your coils will freeze, being as cold as they are.

Makes Sense. But How do They Freeze?

Evaporator coils can freeze for a number of reasons, but there’s three scenarios that we see the most in the field. Usually airflow is the culprit – if the air filter is clogged, or the air registers are somehow blocked, there won’t be enough air flow over the coils – and remember, the purpose of the coils is to cool down air. If there isn’t enough air, they get so cold on their own that they freeze.

We also frequently see dirty or corroded evaporator coils. This is usually the result of customers who haven’t had a good checkup in a while and haven’t replaced their air filter. When dirt and grime collects on the coils, it acts as an insulator, meaning that the coils can’t absorb heat from the air as efficiently.

Finally, we also encounter AC units without enough refrigerant liquid in the coils. This may have occurred because of a leak, so we’ll go through the unit and repair it.

If you’re experiencing frozen coils, feel free to call us today so we can come out and get your air conditioner back in good working order! Whatever the cause is, we’ll find it.

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