The refrigerator does not turn off: 7 reasons and what to do to restore normal operation

When the refrigerator operates around the clock without pauses, this is not just an annoying noise - it is a signal of a malfunction that can lead to serious consequences. From increased energy consumption to complete failure of equipment. But there is no need to panic: in 80% of cases, the problem can be fixed without calling a technician if the cause is correctly diagnosed.

In this article we will look at why the refrigerator does not turn off - from the banal all possible reasonsfor which the refrigerator does not turn off - from the banal incorrect cooling mode to breakdown compressor or thermostat. You will learn how to check each element yourself, which manipulations are safe for beginners, and when it is better to immediately contact the service center. We will also give a checklist of emergency actions if the refrigerator is stuck in continuous operation mode.

We will pay special attention to modern models with system No Frost and inverter compressors - their diagnostics have nuances. And at the end of the article you will find answers to frequently asked questions, including what to do if the refrigerator does not turn off after defrosting or moving.

1. Why should the refrigerator turn off?

In normal mode, the refrigerator compressor operates in cycles: it turns on to cool the chamber to the set temperature, then turns off for 10–30 minutes. The ratio of work and rest time depends on:

• 🔹 Room temperature (the hotter it is, the longer the compressor works)
• 🔹 Call load (a large amount of warm products increases the load)
• 🔹 Type of cooling system (drip vs No Frost)
• 🔹 Age of equipment (older models may have less effective thermal insulation)

If the refrigerator does not turn off more than 1-2 hours in a row, this indicates for:

1. 1. Increased load (for example, in the summer or after loading hot dishes).
2. 2. Malfunction of the temperature control system (thermostat, sensor, control board).
3. 3. Refrigerant leak or compressor breakdown.

⚠️ Attention: If the refrigerator with No Frost does not turn off for more than 8 hours, and ice has appeared on the back wall - this is a sign breakdown of the defrosting system. Immediately defrost the equipment (see section 5).

2. First steps: what to check yourself

Before disassembling the refrigerator or calling a technician, perform 5 simple checks:

Make sure the door is tightly closed (no distortions, the seal is intact)

Check the set temperature (optimally: +4…+5°C in the refrigerator compartment)

Disable the "Super Freeze" or "Quick Cooling" mode

Remove excess products that block air circulation

Check whether the refrigerator is located next to heat sources (battery, stove, sun)-->

If after these manipulations the compressor still does not turn off, proceed to detailed diagnostics.

3. The main reasons for the continuous operation of the refrigerator

Let's look 7 most common reasonswhy the refrigerator does not turn off, and how to identify them:

🔧 Tip: If your refrigerator is equipped an inverter compressor (for example, models LG Inverter Linear or Samsung Digital Inverter), it may work longer than usual in hot weather. This is normal if the pauses between cycles are at least 5–10 minutes.

How to distinguish an inverter compressor from a conventional one?

Inverter models operate almost silently, smoothly regulate power and do not have sudden on/off switches. Conventional compressors make a noticeable click when starting and operate at a constant power. Look at the markings on the sticker on the back: if there are the words “Inverter”, “Linear” or “Digital”, this is an inverter model.

4. Diagnostics of the thermostat and temperature sensors

Thermostat (or thermostat) is the “brain” of the refrigerator that controls the temperature. If it fails, the compressor receives a false signal about the need for continuous cooling.

How to check the thermostat:

1. Unplug the refrigerator.
2. Remove the protective cover (usually located inside the refrigerator compartment or on the top panel).
3. Find the thermostat - this is a small box with a tube attached to the evaporator.
4. Carefully remove the terminals and check the contacts with a multimeter in continuity mode:

   At room temperature, the contacts should be closed.
   When cooling (for example, by applying ice) - open.

⚠️ Attention: In refrigerators No Frost instead of a mechanical thermostat, electronic temperature sensoris often used. Checking it requires special equipment - it is better to entrust the diagnosis to a specialist.

5. Problems with the No Frost system: what to do if the refrigerator does not turn off and ice accumulates

Refrigerators with the system No Frost (for example, Bosch KGN39XL40, Indesit DF 5200) have additional defrost heater i timer. If these elements fail, ice builds up on the evaporator, and the compressor works non-stop, trying to compensate for the lack of cold.

Signs of breakdown No Frost:

• 🔸 Ice on the back wall of the freezer (even if defrosting was recently done).
• 🔸 The refrigerator does not turn off, but does not freeze well.
• 🔸 The fan is humming louder than usual.

How to fix:

1. Defrost the refrigerator for 12–24 hours (completely unplugged).
2. After turning on, listen: if after After 1-2 hours, the operation returned to normal - the problem was temporary icing.
3. If ice appears again, the defrost heater is faulty defrost heater data-i="171">defroster or defroster (replacement required).

6. When to call a technician: signs of serious breakdowns

Some malfunctions cannot be fixed on your own. Contact the service center immediatelyif:

• 🚨 Compressor buzzes, but does not start (audible relay clicks).
• 🚨 Appeared on the back wall of the refrigerator oil stains (freon leak).
• 🚨 The refrigerator electric shock or sparks.
• 🚨 After defrosting, the appliance does not turn on at all.

💰 Repair cost:

• 🔧 Replacing the thermostat: 1 500–4 000 ₽ (depending on the model).
• 🔧 Refilling freon: 3 000–6 000 ₽.
• 🔧 Repairing the control board: 4 000–10 000 ₽.
• 🔧 Replacement compressor: 8 000–15 000 ₽.

⚠️ Attention: If the refrigerator is under warranty, do not disassemble it yourself this will void the warranty. Contact the brand's authorized service center (Samsung, LG, Atlant etc.).

7. Prevention: how to prevent continuous operation of the refrigerator

To ensure that the refrigerator lasts a long time and does not “freeze” in continuous operation mode, follow these rules:

Defrosting drip models every 3-6 months

Cleaning the condenser (rear grill) from dust 2 times a year

Checking the door seal (replace if necessary)

Do not put hot foods in the refrigerator

Maintain a gap of 5-10 cm between the refrigerator and the wall-->

🔋 For models with No Frost: Once a year, turn off the refrigerator for 12 hours for preventive defrosting (despite the name of the system, condensation still accumulates).

🌡️ Optimal temperature settings:

• Refrigeration chamber: +4…+5°C
• Freezer compartment: -18°C (for long-term storage) or -12°C (if there are few products)

FAQ: Frequently asked questions about the continuous operation of the refrigerator

The refrigerator does not turn off after defrosting - what to do?

If after defrosting the compressor works without stopping, check:

1. The tightness of the door (perhaps the seal is frozen and does not fit).
2. The temperature in the chamber (if it is higher than normal, give the refrigerator 2-3 hours to recover mode).
3. Settings - the "Super Freeze" mode may have accidentally turned on.

If after 4-5 hours the operation has not returned to normal, it is likely a freon leak or thermostat failure.

Why doesn’t the new refrigerator turn off on the first day?

This is normal! When you first turn on the refrigerator, it takes 12–24 hours to reach operating mode, especially if:

• There are a lot of products in the chamber.
• The room temperature is higher 25°C.
• The fast cooling mode is turned on.

If after a day the compressor still does not turns off - check the settings or contact the store (possible defect).

Is it possible to use the refrigerator if it does not turn off?

Short-term (1-2 days) - yes, but with caution:

• ✅ Food will not spoil if the temperature in the chamber is kept at level +4°C.
• ❌ Risks: increased energy consumption (up to 2-3 times), compressor overheating, accelerated wear of parts.

If the problem is not resolved within 2-3 days, disconnect refrigerator and call a technician.

The refrigerator does not turn off and gets very hot on the sides - is this normal?

The side walls of the refrigerator can heat up to 40–50°C - this is normal if:

• The equipment operates in intensive cooling mode.
• The capacitor is located on the side (in some models Liebherr or Siemens).

Dangerous sign: if it does not heat evenly, but in one place (freon leakage is possible).

How to check if the compressor is working if the refrigerator does not turn off?

Touch the compressor (black “drum” on the back of the refrigerator):

• 🔹 Hot, but the vibration is uniform —it works fine.
• 🔹 Very hot + clicks are heard — malfunction of the start relay.
• 🔹 Cold, but buzzing —clogged capillary tube or freon leak.