The situation when the refrigerator freezes only the freezerand in the main compartment the temperature rises to room temperature or food begins to spoil is one of the most common breakdowns. Owners often encounter this suddenly: you open the door, and it’s warm inside, although the compressor is humming. This may indicate either a simple violation of operating rules or a serious technical failure in the refrigerant circulation or control system.
Before calling a technician, it is necessary to carry out an initial diagnosis to exclude simple causes. Modern models with the system No Frost or drip defrosting can behave differently with similar symptoms. Understanding how your unit operates will help you isolate the problem faster. If there is ice in the freezer compartment and heat in the refrigerator compartment, it means that cold is generated but not distributed correctly.
In this article we will analyze in detail the main causes of the malfunction, from simple user errors to complex compressor breakdowns. It is critical not to ignore the first signs of uneven coolingas this can lead to a complete stop of the unit and damage large stock of products. We will look at an algorithm of actions that will help you make the right decision: do-it-yourself repair or call for service.
Checking the operating mode and the tightness of closing the doors
The most common, but common reason is an incorrect operating mode or a loosely closed door. If you accidentally set your refrigerator to Holiday or Eco mode, the main compartment may not cool while the freezer continues to operate normally. It is also worth checking whether anything is preventing the seal from fitting tightly.
Carefully inspect the rubber seal around the perimeter of the door. There may be grease, crumbs, or a foreign object on it that creates a gap. Warm air constantly enters the chamber through this gap, and the unit simply does not have time to cool it, working to wear out. In some cases, the seal could simply dry out or become deformed over time.
⚠️ Attention: If you notice that the seal is coming off at the bottom, try warming this area with a hairdryer and pressing the door tightly for a few minutes. This is a temporary solution, but it will help check whether the problem was rubber deformation.
Check the temperature settings. Perhaps someone in the household accidentally messed up the settings by setting the minimum cooling power for the main compartment. On electronically controlled models, this often occurs when wiping the control panel with a damp cloth.
Also make sure that the food in the refrigerator compartment is not lying close to the back wall. If they block the cold air supply channels or temperature sensors, the system may “think” that the chamber is already cold enough and turn off the freon supply, leaving the freezer to operate independently.
- 🔍 Check whether the “Vacation” or “Economy” mode is turned on on the control panel.
- 🚪 Inspect the sealing rubber for dirt and a tight fit around the entire perimeter.
- 🌡️ Make sure that the products do not block the ventilation holes inside the chamber.
- 📉 Check the current temperature settings and, if necessary, set the average values.
No Frost system malfunctions and problems with defrost
If your refrigerator equipped with a system No Frostthen the most likely reason for the lack of cold in the upper compartment is a failure in the evaporator defrost system. The cold in such models is produced in the freezer chamber, and then driven by a fan into the refrigeration compartment through special channels. If the evaporator is overgrown with a “coat” of ice, the air flow is blocked.
An ice plug is formed when one of the elements of the defrost system does not work: heating element (heater), defrost thermostat or timer. As a result, the fan continues to hum, but the air simply cannot pass through the ice shell to the food. In this case, it can be very cold in the freezer, since the source of the cold is located there.
To diagnose this problem, it is often enough to completely defrost the refrigerator. You need to turn off the unit from the network, empty it of food and leave the doors open for at least 24 hours. This time is necessary for the ice inside the housing, which you cannot see, to completely melt and flow out through the drainage hole.
Why 24 hours and not 10?
An ice plug often forms in hard-to-reach places in the air ducts and on the evaporator itself, hidden behind a plastic panel. 10 hours may not be enough to completely thaw the inner layers of ice, and after turning on the problem will return in a couple of days.
If after a day of defrosting and turning on the refrigerator began to freeze normally, but after 1-2 weeks the situation repeated itself, then the defrosting system is faulty and requires replacement of parts. It is difficult to change heating elements or sensors on your own without experience, since you will need to get to the evaporator.
⚠️ Attention: Do not try to chip off the ice with a knife or other sharp objects! You may damage the aluminum evaporator or puncture the freon tubes. Repairs after such an intervention will be very expensive or will become impossible.
- ❄️ With the No Frost system, ice blocks air circulation, not its production.
- 🔌 Complete defrosting within 24 hours is the best diagnostic method.
- 🔁 Recurrence of the problem after a week indicates a breakdown heating element or sensor.
- 🔇 The hum of a fan without cold is a sign of an ice plug in the channel.
Problems with freon circulation: leakage and blockage
A more serious reason why the refrigerator has stopped freezing in the main chamber is a violation of the refrigerant circulation. Freon moves in a closed loop: first it passes through the freezer (where the temperature is lowest) and then enters the refrigerator compartment. If there is little gas in the system due to a microcrack, there is only enough gas for the first section of the circuit - the freezer.
Freon leakage is a hidden process. You will not smell it as the refrigerant is odorless. The tubes may rust from the inside or be damaged mechanically (for example, due to careless defrosting or cleaning). An oily stain often forms at the leak site, but it may appear far from the breakdown site.
Another option is blockage of the capillary tube. An ice plug may form inside the system (if there is moisture in the system) or a blockage from oil and metal oxidation products. In this case, freon cannot circulate freely, the pressure drops, and cold stops flowing into the upper chamber.
☑️ Signs of a freon leak
It is almost impossible to diagnose a leak or blockage at home without manifold. If defrosting for 24 hours did not help, and the compressor hums incessantly, most likely the problem is in the amount or movement of freon.
Repair in this case requires calling a technician. It is necessary to find the location of the leak (often these are sealed joints or hidden sections of pipes), solder it, evacuate the system and fill it with new freon in a strictly defined amount. You cannot do this on your own without equipment.
| Symptom | Probable cause | Nature of compressor operation | Difficulty of repair |
|---|---|---|---|
| Ice in the freezer, heat top | Malfunction of the defrost system (No Frost) | Works cyclically, with stops | Medium (replacement of sensor/heating element) |
| The freezer is freezing, the top is warm | Freon leak | Works without stopping | High (search for leaks, refueling) |
| Noise, gurgling, no cold | Capillary blockage | Operates with overheating | High (purge, filter replacement) |
| Temperature floats | Thermostat malfunction | Rarely turns on or does not turn off | Low (thermostat replacement) |
Faults of the compressor and start relay
The compressor is the “heart” of the refrigerator. If it does not work correctly, the pressure in the system drops. An interesting fact: when the performance of the compressor decreases (for example, valve wear), the freon pressure may be enough to freeze the evaporator in the freezer, but there is no longer enough force to push the gas further along the circuit into the refrigerator compartment.
In such cases, the compressor can work almost non-stop, trying to increase the temperature, but the desired result will not be achieved. It is also worth paying attention to the start relay. If it is burnt or faulty, the compressor may hum, click, but not start, or start and immediately stall. However, if the freezer freezes well, it means that the compressor still starts, but its power is not enough.
Only a specialist can determine the loss of compressor performance. He connects the pressure gauge and checks the discharge pressure. If the pressure is low and there are no leaks, then the compressor is “dying” and requires replacement. This is an expensive repair, often comparable to buying a new refrigerator if the model is old.
⚠️ Attention: If the compressor is hot to the touch (burns your hand) and runs continuously, but there is no cold, immediately unplug the refrigerator. Further work will lead to burning of the motor windings and a fire hazard.
Sometimes the problem lies not in the motor itself, but in its overheating due to contamination of the condenser (grid at the back). If there are years of dust and animal hair on the grille, heat is not removed, pressure rises and cooling efficiency drops. Clean the back wall with a vacuum cleaner or brush.
- 🔥 Overheating of the compressor reduces its efficiency and can lead to breakdown.
- 📉 A drop in pressure is often associated with wear on the motor valves.
- 🧹 Cleaning the condenser grill is a mandatory procedure once a year.
- 🔊 Clicks and hums without starting indicate a problem with the start relay.
Electronics failures: thermostats and sensors
In modern models, electronics are responsible for the distribution of cold and the operation of the compressor. If refrigerator reads the temperature incorrectly, it will not turn on the main compartment cooling. Air sensors (thermistors) located inside the chambers are responsible for this.
If the sensor in the refrigeration chamber “lies” and shows that it is already -5°C (although in fact +15°C), the control module will not give the command to cool. In this case, the freezer may have its own sensor, which works correctly, so the cold remains there. Replacing the sensor is usually inexpensive and does not require complex repairs.
It is also worth mentioning the damper in two-chamber systems. This is a damper that opens and closes to allow cool air from the freezer into the upper chamber. If it is stuck in the closed position (often due to ice or a broken drive), air simply does not get to the products.
Electronics diagnostics require a multimeter. It is necessary to “ring” the sensors for resistance at different temperatures. If the readings differ from the nominal ones indicated in the technical documentation for your model Indesit, LG or Bosch>, the part must be replaced.
Sometimes the problem is solved by rebooting the “brains” of the refrigerator. To do this, you need to turn off the device from the network for 15-20 minutes. This will reset the controller errors if they occurred due to a power surge.
Action algorithm: what to do right now
If you find that it is warm in the refrigerator compartment, do not panic. It is better to transfer the products to a cool place or put them in the freezer if there is space. Follow the following plan to minimize damage and correctly diagnose the problem.
First, eliminate the human factor: check the settings, how tightly the doors are closed, and whether you have filled the chamber with fresh food. Then do the defrost test. This is the safest and free diagnostic method. If it doesn’t help, get ready to call a technician.
☑️ Action plan in case of breakdown
Do not attempt to disassemble the back panel inside the freezer if you do not have experience. You may damage plastic, fragile tubing, or electrical connections. It is better to take a photo of the breakdown location and show the photo to the technician when you call - this will speed up the diagnosis.
⚠️ Attention: When calling the technician, be sure to name the exact model of the refrigerator (located on the sticker inside the chamber or on the back). This will allow the specialist to take with him the necessary spare parts (freon, sensors, heating elements), since they differ from different manufacturers.
Remember that timely contacting professionals is often cheaper than trying to “press on” a compressor that is running out of wear and tear or defrost ice that is building up again.
Frequently asked questions (FAQ)
Is it possible to operate a refrigerator if it does not freeze in the upper compartment?
For a short time, it is possible, but not advisable. The compressor will work non-stop, trying to gain temperature, which will lead to overheating and rapid wear. In addition, the food in the upper chamber will spoil.
How much does repair cost if the refrigerator freezes only the freezer?
The price depends on the breakdown. Replacing the defrost sensor or heating element is the cheapest. Refilling with freon and finding leaks is more expensive. Replacing a compressor is the most expensive procedure. The technician will tell you the exact amount after diagnostics.
Why, after defrosting, did the refrigerator stop freezing again after 3 days?
This is a sure sign of a malfunction of the defrosting system (the heating element, timer or sensor burned out). Ice blocked the channels again. The faulty part of the No Frost system needs to be replaced.
Could the thermostat be to blame if there is cold in the freezer?
Yes, if the thermostat (or air sensor) is installed in the refrigerator compartment and shows the wrong temperature, the compressor may not turn on or turn off too early, without having time to freeze the main compartment, although it is cold in the freezer lasts longer.
What to do if the compressor is hot and does not turn off?
Urgently unplug the refrigerator. Give