The situation when puddles suddenly appear in the refrigerator compartment, and a thick layer of ice grows on the back wall, can unbalance any owner of household appliances. Many users are faced with the fact that the refrigerator is melting for no apparent reason, ignoring the set temperature conditions. This is not just an aesthetic problem, but a signal that a malfunction has occurred in the operation of the unit, which can lead to spoilage of products and failure of expensive components.
The physics of the process is simple: moisture from the air condenses on cold surfaces and freezes, forming frost. In a working device, this moisture should be regularly removed through the drainage system. If you observe that the refrigerator began to melt, it means that the water removal mechanism is broken or heat exchange is disrupted. It is important not to panic, but to sequence the possible causes, starting from the simplest ones.
In this article we will look in detail at why icing occurs, how to diagnose the problem yourself and in which cases the intervention of a technician will be required. Understanding the operating principles of your model Indesit, Bosch or LG will help you avoid unnecessary expenses on repairs. The main thing is to act methodically and follow safety precautions.
Natural causes of icing and operating errors
Before looking for complex technical faults, it is worth eliminating trivial errors in use. Often the refrigerator is melting due to the fact that the user unknowingly creates conditions for excess moisture formation. For example, if you put a hot pot of soup in the chamber, the cooling system will try to sharply reduce the temperature, producing a huge amount of cold. Moisture from the air will instantly turn into an ice crust.
The second common reason is a leak. If refrigerator door does not close tightly, warm air from the room constantly flows inside. The sensor system detects the temperature increase and causes the compressor to work without stopping. As a result, the evaporator is covered with a “fur coat”, which periodically thaws, creating puddles at the bottom.
⚠️ Attention: Constant operation of the compressor due to wear and tear due to a loose door can lead to its overheating and expensive repairs within several months.
Also It is worth checking whether air access to the evaporator is blocked. If food is placed close to the back wall, condensation cannot drain into the drainage hole, but freezes directly on the shelves. In models with drip system this is especially critical.
- 🍲 Frequent opening of the door and placing warm food inside.
- 🚪 A door that is not tightly closed or a damaged seal.
- 📦 Products blocking ventilation holes.
- 💧 High humidity in the room where the equipment is located.
Problems with the seal and chamber tightness
If you are convinced that the operating mode is correct, but the refrigerator still melts, attention needs to be switched to rubber door seal. This is the first line of defense against heat. Over time, the rubber loses its elasticity, cracks, or simply becomes contaminated with grease and crumbs, no longer fitting tightly to the body. Even a microscopic gap of 1-2 millimeters leads to a constant flow of moist air.
You can check the tightness with a simple test with a sheet of paper. Clamp the sheet with the door around the perimeter. If the paper is pulled out easily and without resistance, it means in this place the seal does not hold. Often the problem lies in the deformation of the door itself, which could sag under the weight of food. In such cases, adjustment of the hinges is required.
Dirt on the seal is the enemy that is forgotten. The greasy coating prevents the rubber from sticking to the metal. Regular washing with warm water and a mild detergent will restore the properties of the sealant. If the rubber has become hard and brittle, it must be replaced, since it is possible to restore elasticity using traditional methods (boiling water, hair dryer) only for a short time.
Malfunctions of the defrost system in refrigerators No Frost
Owners of equipment with the system No Frost are often surprised to find ice where it should not be. The operating principle of such models involves automatic defrosting of the evaporator several times a day. If No Frost refrigerator it begins to accumulate ice inside the chamber or behind the back panel, it means that the defrost cycle is broken.
A whole unit, consisting of a heating element (heater), a defrost sensor and a timer (or electronic control module), is responsible for the defrosting process. If the heating element burns out, the ice on the evaporator does not melt, but grows until it blocks the air circulation channels. As a result, the cold stops entering the chamber, the food spoils, and behind the back wall you can see a huge lump of snow.
The defrost sensor often fails. It should give a signal that the ice has melted in order to turn off the heating. If the sensor is stuck or shows incorrect data, the system may not start defrosting at all or, conversely, heat for too long. Diagnostics of these elements requires multimetra and partial disassembly of the refrigerator.
| System element | Symptom of breakdown | Probability |
|---|---|---|
| Evaporator heating element | The ice does not melt, the compressor hums, there is no cold | High |
| Defrost sensor | The refrigerator freezes poorly, there is no ice evaporator | Medium |
| Defrost timer | Ice build-up, cyclic failures | Low (in new models) |
| Fuse | Complete lack of response from the defrost system | Average |
How to check the heating element with a multimeter?
To check, you need to ring the heating element for resistance. The normal value is usually between 200 and 500 ohms. If the device shows one or zero, the heating element has burned out and requires replacement. Don't forget to turn off the power to the refrigerator before diagnostics!
Clogged drainage system and tray
One of the most common reasons why the refrigerator melts inside water collects on the shelves is a simple clog in the drainage hole. Water from the condensate should flow freely through the groove into a special container above the compressor, where it safely evaporates. If this path is blocked, the water has nowhere to go, and it freezes, forming a plug.
The clog can form due to crumbs, mold or pieces of ice. In drip models, the hole is located at the bottom of the back wall. You can clean it with a soft wire, a brush or a simple cotton swab. After mechanical cleaning, it is recommended to rinse the channel with warm water from a syringe or syringe.
Do not forget about the evaporator tray located above the motor. If it is cracked or dislodged, water will drip past it and onto the floor. Also, the tray may become covered with dirt, which prevents the rapid evaporation of moisture, and then the water begins to overflow.
☑️ Cleaning the drainage
Failures in the operation of the thermostat and sensors
Thermostat (thermostat) - This is the "brain" that decides when to turn the compressor on and off. If this device is acting up, it may command cooling too often or not turn off the motor at all. As a result, temperature in the refrigerator falls below normal, moisture freezes out of the air faster than it can be removed and turns into ice.
Modern electronically controlled models use air sensors instead of a mechanical thermostat. They can become dirty or fail, transmitting incorrect data to the control module. For example, the sensor may “think” that it is warm in the chamber, although in fact it is already minus.
A symptom of a malfunctioning thermostat is often that the refrigerator does not turn off at all, working around the clock. Or, on the contrary, it sits for too long and the food begins to spoil. Replacing the thermostat is a simple procedure, but requires precise adjustment so that the temperature regime corresponds to the declared one.
⚠️ Attention: In some models of refrigerators (for example, Stinol or old Atlantakh) the capillary tube of the thermostat may lose its tightness. In this case, only a complete replacement of the unit will help.
Freon leak and problems with the compressor
The most unpleasant scenario, why the refrigerator has stopped freezing is properly covered with ice in one corner is a refrigerant leak (freon). When there is not enough gas in the system, the compressor works non-stop, trying to gain temperature. In this case, the evaporator freezes only partially (usually at the entrance), and the rest remains warm.
Trying to compensate for the lack of cold, the unit freezes out all the moisture, which turns into an ice coat. However, this cold is no longer enough for food. It is difficult to determine a leak visually; often this is indicated only by the continuous operation of the motor and a warm condenser (grid at the back).
Problems with the compressor itself, such as a drop in performance or an interturn short circuit, lead to similar symptoms. The motor hums, but does not create the required pressure in the system. In such cases, independent repair is impossible; you need to call a technician with equipment for vacuuming and refilling the system.
Frequently asked questions (FAQ)
Why does the refrigerator melt after defrosting?
If you defrosted the unit, turned it on, and it quickly became covered with ice again, perhaps you did not have time to dry the drainage hole, and there was water left there, which froze, forming a plug. Or the problem is of a technical nature (the sensor or heating element is faulty), and defrosting gave only a temporary effect.
Is it possible to use the refrigerator if it leaks a little?
For a short time - you can, by collecting the water with a towel. Continued operation in this mode is dangerous. Water can get on electrical contacts, corrode the casing, or cause panels to swell. In addition, constant humidity is an ideal environment for mold.
How often should you defrost the refrigerator manually?
Models with manual defrosting require attention every 3-6 months, depending on the humidity in the room. Systems Drop (drip) defrost themselves, but once a year it is still recommended to turn them off for hygienic washing. No Frost does not need defrosting.
What to do if the drainage hole is frozen?
No picking at it with a knife or sharp objects can pierce the plastic channel or damage the evaporator. Use warm water (not boiling water!) and a rubber bulb or syringe to gently melt the ice plug.