If you’ve ever had a freezer evaporator coil freeze up, you know how much of a hassle it can be to thaw it out. But what causes a freezer evaporator coil to freeze up in the first place? And how can you prevent it from happening again? In this blog post, we’ll explore these questions and more.
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What is a freezer evaporator coil?
The evaporator is housed inside the freezer and is responsible for cooling the air in the freezer. The evaporator coil is a series of tubes that the liquid refrigerant absorbs the heat from the air passing over it. The refrigerant evaporates to a gas as it absorbs the heat, lowering the temperature of the air.
How does a freezer evaporator coil work?
The evaporator coil is designed to remove heat from the inside a freezer. If the evaporator coil gets too cold, ice will form on the outside of the coil. The ice insulates the coil from the air in the freezer so it can’t get back to work removing heat. This is what causes a freeze up.
The cause of a freeze up can vary depending on where the coil is located inside the freezer. It could be caused by the following:
1. A clogged filter
2. A Freon leak
3. The coil is covered in dust, pet hair, or other debris
4. An issue with your defrost heater
If your evaporator coil is located inside the freezer compartment, try to locate it and look to see if there is any frost or ice on it. This is a telltale sign that there is a problem with the coil.
Why do freezer evaporator coils freeze up?
While the evaporator coils are designed to be cold, they wont freeze. This means theyre at the right temperature. However, if the coils get too cold, it can result in the coils freezing and forming a block of ice. This is a sign that there is an issue with the defrost functions in the unit.
There are a few different causes for the defrost functions failing in a refrigerator. Ranging from something as simple as a dirty coil to a more serious issue with the defrost system.
What to do when your freezer evaporator coil freezes up
When your freezer evaporator coil freezes up, the airflow is blocked, and the cooling process is interrupted. This can cause your items to start to melt and may even cause the entire freezer to stop working. Before you jump to conclusions about the health of your freezer, check to see if the evaporator coils are the source of the problem.
A frozen evaporator coil is usually caused by a lack of airflow from the freezer fan, or a build-up of frost inside the freezer.
Dirty or faulty components: The air filter is responsible for filtering the air that flows into the air evaporator. The air filter keeps dust and other particles from touching the evaporator coils and freezing them. Sometimes these filters become clogged, causing the evaporator to freeze up. This is usually due to a bad gasket, or a clogged air filter. You will need to replace the air filter to fix the problem. A faulty thermostat may also be to blame. If the thermostat stops working, it may cause the freezer to stop cooling.
Frost buildup: If frost begins building up inside your freezer, it may cause the evaporator coil to freeze. Usually, the frost buildup in the freezer is due to a broken or maladjusted door gasket. The gasket can stop sealing properly, allowing warm air to enter the freezer.
The first thing you want to do is open the freezer door and inspect the evaporator coil. If the coil is iced over, you can check for any signs of frost inside the freezer.
freezer evaporator coil freezing up Buying Guide
Some models have an access panel in the back of the freezer, behind which is the evaporator coil. Pull out the access panel—it might be on a hinge—and remove any screws or fasteners holding the panel in place. Then slide it out or lift it off to get at the evaporator coil. If you don’t have an access panel, remove the back wall of the freezer to reach the evaporator coil.
You can also access the evaporator coil through the front of the freezer. Remove the toe plate, which is the kick plate at the bottom of the front of the freezer. Then reach up and remove the drip tray to expose the evaporator coil at the bottom.
Clean the evaporator coil with a stiff brush and a coil cleaning solvent. Spray the solvent on the coils and wait several minutes to let it do its work. Then brush the coils clean. Clean the drip tray, too—it is typically made of plastic, so you can wash it with soap and water.
The next step is to clean the condenser. Use a brush or vacuum cleaner to remove dirt, dust, and debris that have accumulated on the condenser. Be sure to clean around the fins in the condenser, too. Clean the condenser several times a year to keep it running at peak efficiency.