Samsung Refrigerator Defrost Problem – What to Check – How to Fix




As an Amazon Associate, I earn from qualifying purchases. We get commissions for purchases made through links on this website from Amazon and other third parties.

The latest Samsung refrigerator comes with a separate freezer compartment. It takes care of your foods reserved in the refrigerator by maintaining a low temperature in the freezer section. To prevent freezer section from being frost, these refrigerators run several defrost cycles as necessary. In these defrost cycles, refrigerator passes warm air to the freezer and melts the clogged ice. Samsung refrigerator defrost problem will create different freezing issues.

samsung refrigerator defrost problem

Troubleshoot Samsung Refrigerator not Defrosting Problem

There are various reasons behind your refrigerator’s defrosting issue. Let’s check the most common reasons and their best solutions.

Replace Defrost Control Board

This defrost control board maintains the activity of defrosting components by sending voltage. If this component is damaged, refrigerator fails to run defrost cycle. As a result, you will face cooling issue in your refrigerator.

But this control board is one of the least problematic components in your machine. So, you must check other defrost components like defrost heater and defrost thermostat before replacing this control board.

If you notice that the defrost heater and the defrost thermostat are doing their job properly then the control board is defective. So, you should consider replacing it.

Test Defrost Timer

Defrost timer wakes up defrost heater by sending voltage when the evaporator coils get frosting. Generally, it happens several times a day and melts the frost in the evaporator coils.

A defective defrost timer fails to send voltage to the defrost heater. As a result, defrost heater can’t start its duty.

So, test the defrost timer-

  • Firstly, move the dial to the defrost cycle.
  • At this point, compressor will stop working and the defrost heater will run.
  • If the timer passes voltage to the defrost heater then the heater will run and start defrosting.
  • If the defrost heater doesn’t start after 30 minutes when you pressed the dial to the defrost cycle, the defrost timer is defective. You must replace it.

Test Defrost Heater Assembly

Generally, a defrost heater assembly needs to be activated several times a day and defrosts any frost that was made in the evaporator coils. If the assembly is faulty, the heater will not run. As a result, evaporator coils become frosted and clogged.

How to test Samsung refrigerator defrost heater assembly? Ok, just follow-

  • Take a multimeter and connect it with the defrost heater assembly.
  • If multimeter doesn’t show the expected readings, the assembly is faulty.
  • Replace it with a new one.

Check Defrost Sensor & Fuse

Defrost sensor comes with a fuse. It takes temperature reading from the evaporator. When defrost heater passes warm air and melt the frost, defrost sensor takes the readings and stops defrost heater from flowing more warm air.

If the defrost sensor fails to stops the activity of defrost heater due to mechanical fault, the fuse will be blown away which will stop defrost heater’s activity. As a result, your refrigerator will face defrosting issues.

So, test Samsung refrigerator defrost sensor for any error-

  • Take a multimeter and test the defrost sensor and fuse for continuity.
  • If there is no continuity in defrost sensor or the fuse has been blown away, you must replace it. Because the defrost sensor and fuse are not repairable.

Test Defrost Thermostat

The duty of a defrost thermostat is to monitor the temperature of the evaporator coils. If the coils goes to the below of a certain temperature, the thermostat contacts will close.

It will start passing voltage to the defrost heating assembly to start the defrost cycle. Then ice will be melted that was frosted in the evaporator coils.

If your refrigerator’s defrost thermostat becomes defective, its contacts will not close. As a result, the heater won’t run and the ice that has been accumulated on the evaporator coils will not melt.

  • Test the defrost thermostat with a multimeter.
  • If there is no continuity even when it reaches the lowest temperature, the defrost thermostat is faulty.
  • Replace it with a new one.

Replace Main Control Board

The main control board is the mother of all activities of your refrigerator. It circulates necessary power to every component of your refrigerator including defrost components. A faulty main control board fails to provide power to the defrost system.

However, the main control board is the most durable component in your refrigerator. It can be misdiagnosed that may lose you a handsome amount of money.

That is why follow all other steps and solutions stated above. If your machine still faces defrosting problem, you may go ahead to test the main control board. If it fails to show its continuity in multimeter test, replace it.


How to defrost Samsung fridge?

Most of the modern Samsung fridge comes with defrost timer. It automatically stops the cooling mode and defrosts freezer or its components as necessary.

However, you can forcefully defrost your Samsung fridge by following these steps:

  • Press both “Power Freeze” and “Fridge” buttons at a time.
  • Hold down them until you notice the display goes blank.
  • Press the “freeze” or any other button until you notice “Fd” on the display.
  • Now your refrigerator will start defrosting.

The above mentioned process may vary from model to model. But you can defrost your refrigerator manually at any time.

-Turn the refrigerator power off and keep the freezer door open unit it defrost.


-Use a hair dryer and blow the freezer compartment to defrost it.

Why is my Samsung refrigerator icing up?

Check the temperature settings in your refrigerator. Most possibly, the temperature is set to low. That is why it is icing. Just raise the temperature a few degrees. It will solve icing issue.

Why is my Samsung fridge not defrosting?

Your Samsung fridge comes with an automatic defrost system. This defrost system is consisted of defrost timer, heater, sensor, thermostat and control board. If one of the components becomes defective, your Samsung fridge won’t defrost.

How do I test my Samsung defrost thermostat?

Disconnect the defrost thermostat from the defrost system. Now connect it with a multimeter. If you are getting the expected readings from it, the thermostat is completely Ok. Otherwise, it is faulty.

Where is the defrost timer located in a Samsung refrigerator?

Defrost timer is located on the back wall of your Samsung Refrigerator. You will find it behind the lower kickplate in the control panel.


All of the reasons and solutions behind the Samsung refrigerator defrost problem are suggested not only by expert technicians but also recommended by the manufacturer. So, you can follow it.

Always try to use manufacturer’s spare parts when needed. It will keep you away from extra hassle for many days.

If your refrigerator is still in the warranty period, don’t try to fix it at home. Otherwise, it may void the warranty. Rather, claim the warranty and get fixed by the manufacturer’s expert technician. If you are not familiar with fixing problems, you should call an expert technician.

Related Post:

About the author

One response to “Samsung Refrigerator Defrost Problem – What to Check – How to Fix”

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Latest posts

  • What Are The Disadvantages Of Smart Washing Machine?

    What Are The Disadvantages Of Smart Washing Machine?

    To keep step with the current times, manufacturers are developing smart washing machines using different advanced technologies. These machines are designed to make the task of laundry easier and more convenient. Is a smart washing machine worth purchasing? Is it perfect for all? But why do some people want to avoid smart washers for their…

    Read more

  • How To Reset Maytag Commercial Technology Washer?

    How To Reset Maytag Commercial Technology Washer?

    Maytag is not only a reputable but also a trusted brand in the sector of home appliances. To solve consumers’ laundry problems, Maytag has introduced so many washing machine models. All of them are ruling in the market. Along with other mini types of washing machines, this manufacturer has introduced some commercial grade washers. To…

    Read more