Why Freezer Is Too Warm? What’s the Cause and How To Fix?

Freezers are one of the most used appliances in most homes, as they’re designed to keep food cold. However, if your freezer is too warm, it can cause food spoilage and damage your unit, so it’s essential to determine the cause and take appropriate action.

Your freezer may be too warm because of a defective defrost thermostat, a leak in the sealed system, a damaged compressor, or clogged freezer coils. To fix the issue, you could turn off the power supply, wait for the unit to cool down, defrost the freezer, or change any damaged parts. 

In this article, I will discuss the most common causes of why your freezer is too warm and possible solutions to fix these issues. So, let’s get started!

A freezer’s defrost system comprises three components: 

• Thermostat
• Heater
• Timer 

When the coils in the freezer become too cold, the timer cues the heater to turn on and melt the excess ice buildup. In the same way, if the freezer becomes too warm, the thermostat prompts the heater to turn off so that the coils maintain a normal temperature. 

The defrost thermostat is a system component that regulates the temperature in the freezer. If the sensors in the thermostat are defective, it can cause your heater to run continuously and make the freezer warm.

How To Fix?

You cannot tell if your thermostat has failed simply by looking at it. You will need to perform a continuity test to see if a continuous electrical path is present in the thermostat. 

To perform a continuity test, follow these steps:  

1. Identify your thermostat’s power source and ground terminals.
2. Perform a continuity test using a multimeter by placing the red lead on one terminal and the black lead on the other terminal.  

If you get continuity, your thermostat is working fine. However, if you don’t, the thermostat has failed, and you need to get a new one.

Here’s a video explaining how you can replace a defrost thermostat in your freezer:

Freezers are one of the most used appliances in most homes, as they’re designed to keep food cold. However, if your freezer is too warm, it can cause food spoilage and damage your unit, so it’s essential to determine the cause and take appropriate action.

Your freezer may be too warm because of a defective defrost thermostat, a leak in the sealed system, a damaged compressor, or clogged freezer coils. To fix the issue, you could turn off the power supply, wait for the unit to cool down, defrost the freezer, or change any damaged parts. 

In this article, I will discuss the most common causes of why your freezer is too warm and possible solutions to fix these issues. So, let’s get started!

A freezer’s defrost system comprises three components: 

• Thermostat
• Heater
• Timer 

When the coils in the freezer become too cold, the timer cues the heater to turn on and melt the excess ice buildup. In the same way, if the freezer becomes too warm, the thermostat prompts the heater to turn off so that the coils maintain a normal temperature. 

The defrost thermostat is a system component that regulates the temperature in the freezer. If the sensors in the thermostat are defective, it can cause your heater to run continuously and make the freezer warm.

How To Fix?

You cannot tell if your thermostat has failed simply by looking at it. You will need to perform a continuity test to see if a continuous electrical path is present in the thermostat. 

To perform a continuity test, follow these steps:  

1. Identify your thermostat’s power source and ground terminals.
2. Perform a continuity test using a multimeter by placing the red lead on one terminal and the black lead on the other terminal.  

If you get continuity, your thermostat is working fine. However, if you don’t, the thermostat has failed, and you need to get a new one.

Here’s a video explaining how you can replace a defrost thermostat in your freezer: