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Why Is My Freezer Frosting Up?

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Don’t you just hate it when you find frost buildup in your freezer compartment? You want your frozen items and food stored properly in there, but the accumulated frost formation makes it impossible to do so. If you’re anything like us at Don Fuller’s Appliance Repair, you know how important it is to keep home appliances like your freezer and refrigerator in top working condition.

Related Article: How Long Will Food Last in a Freezer Without Power?

So, to help you defeat the frosty nightmare in your freezers, we’ll walk you through the most common causes of the pesky frost in your freezer (and how to avoid them)!

1. Damaged or Dirty Door Seal

Freezer doors need to be sealed properly to keep the cold air inside. When the door seals get torn, broken, cracked, or dirty, or the door is just not sealing properly, there’s space between the door gasket for warm air and excess moisture to enter. This eventually leads to freezer frost.

Solution: To prevent frost buildup on the surfaces inside your freezer, regularly clean your freezer door seal, constantly check it for damage, fix any issues promptly, and try not to put too much food on the shelves of your fridge and freezer, as that can make it hard to close the door securely.

2. Exposure to Warm Air or Humid Air

Every time you leave your freezer door open, warm air or moist air sneaks in and meets the cold air inside. The moisture carried by humid air freezes after entering the cool compartment and turns into extra frost inside. This is why refrigerators left open in places with high humidity levels are more likely to experience frost build-up in the freezer.

Solution: To keep this from happening, try not to spend too much time rummaging through the contents of your fridge to keep the unwanted moisture and humidity out. Additionally, you want to let hot food cool before putting it in the refrigerator or freezer to avoid moisture. Just remember that it’s best to keep your freezer door closed as much as possible.

3. Temperature Constantly Changes or Is Set Too Low

woman adjusting the temperature of the freezer

Frost buildup in freezers happens when moisture freezes after reaching the evaporator coils located inside the freezer compartment. When the temperature inside the appliance keeps jumping from freezing to warm, it may create even more moisture that can end up as freezer frost. Aside from that, temperature fluctuations are also known to cause freezer burn, which affects the quality of your food.

Similarly, setting the refrigerator or freezer temperature too low allows moisture and condensation to quickly freeze. Too-low temperatures can also force the evaporator coils to work extra hard. This can make the appliance go through a defrost cycle more often, which leads to even more moisture and, in turn, more freezer frost or extra ice inside.

Solution: Avoid sudden changes in temperature and don’t set the temperature lower than the optimal freezer temperature, which is 0 degrees Fahrenheit. Keep the temperature consistent and consider putting a thermostat inside the freezer to accurately monitor the temperature.

4. Blocked Vents

Freezer vents are responsible for circulating air throughout the space. So, if it’s blocked by ice buildup and pieces of food, the cold air can’t flow properly. As a result, there can be uneven cooling, which can lead to ice building up in certain spots in the freezer.

Solution: To prevent blocked vents in your freezer, pay attention to how you store food in the compartment. Make sure they’re arranged properly so they don’t end up blocking the vents. Also, keep an eye out for ice buildup, and don’t wait for it to get worse—physically remove them or defrost the freezer as soon as you see a sign of freezer frost.

5. Compromised Defrost System

The defrost timer of your freezer is in charge of making the excess ice melt to prevent frost or ice buildup. When that system doesn’t work as intended, you end up with an ice-filled freezer.

Solution: To start, you can try removing any clogging around the vents and drainage areas. If that doesn’t work, we suggest contacting an appliance repair professional for their services.

6. Not Enough or Too Much Food in the Freezer

vegetables, fruits, and food containers inside fridge and freezer

Sometimes, the amount of food stored in your freezer can contribute to the buildup of frost. Stuffing too many food containers in there makes it hard to properly close or seal freezer doors. As a result, when you accidentally leave the freezer door open due to overstuffing, you’re allowing humidity and moisture to enter. This moisture ends up freezing, which turns into frost. Additionally, too much food inside the appliance can also keep the cold air from properly circulating inside the freezer.

On the other hand, leaving the freezer too empty can cause the freezer to run longer in an effort to keep everything cold. As a result, you end up with more frosting.

Solution: Organize the food you put behind your freezer door. You can do this by using space-saving containers that can help you make the most out of your freezer space. You can also plan your groceries to avoid buying too much, to the point that you can’t even close your freezer door from all the food stored inside (we’ve all been there!).

7. A Faulty Thermostat

Your freezer’s thermostat controls and regulates the temperature of the appliance. If it’s broken or not working properly, you can end up with a freezer that’s too cold or too warm. It can also make the freezer run more often than necessary, leading to more moisture and, in turn, (you guessed it) freezer frost.

Solution: To avoid a faulty thermostat, schedule regular maintenance checks and keep the freezer clean to prevent dust and debris from affecting the thermostat’s performance. If you notice signs of frost buildup in your freezer, you can have a professional fix it for you.

Other Reminders to Help Prevent Freezer Frost

woman opening the refrigerator door

Here are other reminders to keep in mind:

  • Like most home appliances, your freezer needs regular maintenance. Regular inspection can help identify issues with various freezer parts, like the door gasket or seal, condenser coils, and thermostat. It’s easier to fix the problem once you identify it early enough.
  • Don’t place the refrigerator and freezer beside appliances that heat up, like a dryer, water heater, stove, dishwasher, oven, microwave, electric kettle, and coffee maker. The heat can compromise the freezer components over time. Also, the heat produced by these appliances can influence the temperature around and inside the freezer, which could lead to moisture and frost.
  • Don’t wait for the issues to get worse. Professional assistance from trusted repair technicians may be the answer to your freezer problems!

Looking for a quick fix or a more complex repair? Fret not, because our team at Don Fuller’s Appliance Repair has you covered. We offer the best appliance repair in Edmond, OK, so leave it to us to get your appliances up and running again!

Give us a call at (405) 622-5961 or book an appointment online to get started!