The tube on the refrigerator freezes: causes, consequences and solutions

Have you opened the refrigerator and noticed that a thick layer of ice has formed on the metal tube on the back wall or side? This is not just an aesthetic problem - it signals a malfunction that can lead to compressor failure, increased energy consumption, or even food spoilage. In 80% of cases, the cause can be eliminated on your own, but it is important to correctly diagnose the source of the problem. ice on the cooling circuit tube indicates malfunctions that can lead to compressor breakdown, increased energy consumption or even food spoilage. In 80% of cases, the cause can be eliminated on your own, but it is important to correctly diagnose the source of the problem.

In this article we will analyze all possible causes of freezing of the tube from banal drainage clogging to thermostat failure, and also give step-by-step instructions for eliminating each of them. You will know when it is enough to defrost the refrigerator and when parts need to be replaced. We will pay special attention to models with a system No Frost (for example, Samsung RB37J5240SA, LG GA-B489YQQZ), where ice on the tube often indicates malfunctions of the fan or electronic unit.

We warn you right away: if the tube freezes unevenly (only in one place) and the ice has a yellowish tint, this is a sign of a freon leak - in this case, independent repair is dangerous! We will analyze the remaining cases in detail.

1. Clogged drainage system is the most common cause

In 60% of cases, the tube on the back wall of the refrigerator freezes due to a clogged drainage hole. The water that should flow into a special tank stagnates and turns into ice. This is especially true for models with drip defrosting system (for example, ATLANT XM 4021-000 or Indesit DF 4180 W).

How to check the drainage:

1. Unplug the refrigerator and defrost it for 10-12 hours.
2. Find a drainage hole on the back wall (usually at the bottom, under the evaporator).
3. Rinse it with warm water using a syringe or syringe without a needle.

• 🔧 Signs of clogging: water accumulates under the vegetable boxes, ice forms only in the lower part of the tube.
• ❄️ What will happen if you do not clean: the compressor will start working without stopping, which will lead to its overheating.
• 🛠️ Cleaning tools: wire 2–3 mm in diameter, cotton swabs, soda solution (1 tbsp per 1 liter of water).

If after cleaning the drainage the problem remains, check drain tube it may be pinched or cracked in models Bosch KGE39XW2AR i Liebherr CPes 4066 The drain tube often becomes dislodged when moving the refrigerator.

2. Malfunction of the thermostat or temperature sensor

The thermostat (or an electronic sensor in modern models) regulates the operation of the compressor. If it fails, the compressor either works without stopping. or it turns on too rarely. In both cases, the evaporator tube freezes.

How to diagnose:

• 🔍 Listen to the compressor: if it runs for more than 20 minutes without pauses, the thermostat is stuck in the “on” position.
• 🌡️ Check the temperature in the chambers: if in the freezer –10°C, and in the refrigerator +15°C, the sensor does not read the data correctly.
• 🔧 In models with electronic control (for example, Samsung RL-62 ZBMS), the sensor error may be displayed on the display as a code E1 or E2.

⚠️ Attention: In refrigerators with electronic control (for example, LG DoorCooling+), replacing the sensor yourself can lead to firmware failure. If you are not confident in your skills, call a specialist.

3. Freon leak: when ice is dangerous

If the tube freezes uneven (only in one place) and the ice has a yellowish or rusty tint, this is a sign refrigerant (freon) leaks. This problem requires urgent repair, since the compressor wears out, and the food in the refrigerator can spoil in a few hours.

Causes of leakage:

• 🛠️ Mechanical damage to the tube (for example, during transportation or careless defrosting).
• 🔥 Corrosion of aluminum tubes in older models (for example, Stinol 102, ZIL-63).
• 🔧 Defective soldering of tubes at the factory (found in budget models Beko i Vestfrost).

What happens if you ignore a freon leak?

If you do not fix the leak, the compressor will operate at maximum power, which will lead to its overheating and breakdown in 1–3 months. In addition, the products in the refrigerator compartment will begin to deteriorate due to unstable temperature. In models with the No Frost system, a freon leak can cause the fan to freeze and stop, which will lead to a complete failure of the refrigerator.

⚠️ Attention: It is impossible to eliminate a freon leak on your own - special equipment for evacuation is required. system and refrigerant refilling. Contact the service center, indicating the model of the refrigerator and a description of the problem (a photo of the ice on the tube will help the technician quickly diagnose the problem).

4. Problems with the No Frost system: fan and defrost heating element

In refrigerators with system No Frost (for example, Samsung RL-34 MERS, Electrolux ENN 2854-3X) the tube may freeze due to a malfunction of the fan or defrosting heating element. These elements are responsible for the uniform distribution of cold air and periodic removal of frost.

How to check:

1. Turn off the refrigerator and defrost it for free. 24 hours.
2. After switching on, listen: if the fan does not make noise in the first 10-15 minutes, it is out of order.
3. Check the defrosting heating element: if after 6-8 hours of operation frost appears on the tube again, the heating element is not heating.

Check the operation of the fan (should turn on 5-10 minutes after startup)

Inspect the defrost heating element for breaks or blackening

Make sure there is no ice or foreign objects on the fan blades

Check the integrity of the wiring to the defrost sensor

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In models LG with DoorCooling+ technology freezing of the tube is often associated with a malfunction additional fanthat blows through the door. If ice forms near the seal, the problem is there.

5. Loss of door seal: seal and hinges

If the sealing rubber on the refrigerator door is worn out or the hinges are sagging, warm air enters the chamber and the compressor begins to work more intensely, and the evaporator tube. freezes over. This is especially true for refrigerators with one compressor system (for example, ATLANT MHM 1705-80 or Biryusa 130).

How to check tightness:

• 📄 Take a sheet of paper and clamp it between the door and the body. If the sheet is easily pulled out, the seal is faulty.
• 🔦 Inspect the seal for cracks or deformations. In models older than 5 years, the rubber loses its elasticity.
• 🔧 Check the hinges: if the door sags, it needs to be adjusted or the hinges replaced.

⚠️ Attention: In refrigerators with magnetic seal (for example, Liebherr Premium) you cannot use lubricants based on petroleum products - they destroy the rubber structure. Use only specialized products.

6. Incorrect installation of the refrigerator

If the refrigerator is too close to the wall (less than 5 cm) or next to a heat source (battery, stove, direct sunlight), the compressor overheats and the cooling system does not work efficiently. This leads to freezing of the evaporator tube ice formation.

Optimal installation conditions:

• 📏 Distance to the wall: at least 5 cm (for models with a condenser on the rear wall - 10 cm).
• 🌡️ Room temperature: from +16°C to +32°C. At +10°C and below, the compressor may not turn on.
• 🔌 The socket must be grounded (especially important for models with electronic control).

In refrigerators Samsung with Twin Cooling Plus technology incorrect installation can lead to freezing of the tube in freezer compartment, since the system has two independent cooling circuits.

7. Failures in the electronic control unit

In modern refrigerators (for example, Bosch KAN92VI30R, Siemens KG39NXB35) the electronic control unit is responsible for the operation of all systems. If it malfunctions, the compressor may turn on randomly, which leads to freezing of the tube.

Signs of a malfunction of the electronic unit:

• 🔄 The refrigerator turns on/off spontaneously.
• 📛 Random characters or errors appear on the display (Er, F, H).
• 🔊 The compressor makes uncharacteristic sounds (clicks, squeaks).

In 30% of cases, the electronic unit fails eliminated by rebooting:

1. Disconnect the refrigerator from the mains for 10 minutes.
2. Plug it back in and set the temperature to +5°C in the refrigerator compartment and –18°C in the freezer.
3. Observe 24 hours: if ice does not appear on the tube, the problem is solved.

Frequently asked questions about ice on the refrigerator tube

❓ Why does ice appear on the tube only in the summer?

In the summer, the room temperature is higher and the compressor works more intensely If the refrigerator is located next to the stove or window, warm air enters through the seal, which causes the tube to freeze. Solution: move the refrigerator to a cooler place or adjust the door hinges.

❓ Is it possible to remove ice from the tube with a knife or fork?

No! Metal objects can damage the tube and cause freon leakage. plastic scraper or defrost the refrigerator naturally. In models with No Frost you cannot clean off the ice at all - this can damage the fan.

❓ How long does it take to defrost the refrigerator if the tube is frozen?

The minimum defrosting time is 10–12 hours. the ice is thick (more than 1 cm), it will take 18–24 hours. You cannot speed up the process with a hairdryer or hot water - this can deform the plastic parts. In refrigerators No Frost after defrosting, be sure to dry the chambers with a towel.

❓ Why does the tube freeze again after replacing the seal?

The seal is probably installed incorrectly or does not fit correctly. Check:

• Are there any gaps between the rubber and the body (use a sheet of paper for testing).
• Is the door warped (adjust the hinges).
• Does the model match? sealant for your refrigerator (for example, for ATLANT and Stinol you need different seals).

❓ What temperature should be in the refrigerator so that the tube does not freeze?

Optimal settings:

• Refrigerator compartment: +4...+5°C.
• Freezer compartment: –18°C (for No Frost -16°C is allowed).

If you set the temperature lower +2°C, the tube will freeze even with a working system. In models with freshness zones (for example, Liebherr BioFresh) the temperature in the main chamber should be +5...+7°C.