What is the defrost resistor in the refrigerator? Structure and working principle

The defrost resistor is an important device to help the refrigerator operate smoothly, effectively and quickly. So what is a defrost resistor? Let’s find out the article What is the defrost resistor in the refrigerator? Structure and operating principle to better understand this device!

What is a defrost resistor?

The ice resistor is an indispensable device in every refrigerator that has the effect of defrosting the frozen ice in the refrigerator , thereby helping the cabinet operate smoothly and reliably.

Structure and working principle of defrost resistor

Structure

The defrost resistor is composed of the following parts:

• The outside is a layer of glass.
• Inside is a string of apricots that works to create a large heat source to help break the snow in the cabinet.
• 2 layers of plastic on both sides of the head.
• 2 wires are placed at the 2 ends of the resistor that connects the devices in the defrost system together.

Working principle

• First, cold clams will be clamped in the middle of the refrigerator’s indoor unit to detect the snow cover in the cabinet.
• When the negative temperature increases, which means that the snow has accumulated on the indoor unit, the contact of the cold cock will close to activate the resistor bar.
• At that time, the rock resistance bar will command the compressor to stop working, Increase the temperature of the indoor unit to help the ice layer melt quickly.
• When the ice layer has melted, the refrigerator temperature will return to normal, the cold cock will automatically disconnect , the defrost resistor will also stop working , bringing cold air to spread evenly throughout the nooks and crannies of the cabinet.

How to check if the defrost resistor is still good?

There are 2 ways to check whether the defrost resistor is still good, specifically:

Method 1: You put the X100 scale of the VOM meter into the 2 resistors . If the clock hands run up to a value of 200 – 700 Ohm, it means that the defrost resistor is still good.

Method 2: You remove the defrost resistor . If when you lean towards the two ends of the resistor you see that the wire inside is broken, the defrost resistor is broken, otherwise it means that the defrost resistor is still in good use.

Some notes that you need to know when replacing the defrost resistor

When replacing the defrost resistor, keep a few things in mind:

• You should check the components of the cabinet to diagnose the exact cause of the damage and replace the correct part.
• The inspection of the drying rod in the cabinet requires a high level of expertise. Therefore, you should not check them yourself but need to contact reputable refrigerator repair centers to have them checked.
• You should only replace genuine parts, knowing the origin to avoid damage that affects other components inside the cabinet or causes unexpected problems!

The above article has provided you with information about what is the defrost resistor in the refrigerator? Structure and working principle for you to better understand this device. If you have any questions, leave us a comment below for answers!