Many owners of modern models with the system No Frost face unexpected behavior of equipment in the cold season. When the temperature outside the window drops below zero, and it becomes cool in an unheated garage or balcony, the refrigerator may stop freezing or, conversely, start working continuously. This is due to the fact that the standard factory configuration is designed for operation in a warm room, and not in the cold.
The essence of the problem lies in the compressor control algorithms, which rely on ambient and evaporator temperature sensors. If you plan to use the unit in conditions where the temperature drops below +10°C, you will need to intervene in the electrical circuit or mechanically modify the defrost system. Ignoring this fact can lead to defrosting of food or failure of the motor.
In this article we will analyze the technical nuances of modifications that will allow you to adapt the household appliance to work in winter conditions. You will learn which elements require attention and how to safely change the operation logic of the device without losing the warranty on the main components, if possible.
Fundamental differences in winter operation
The main difficulty is that the refrigerant circulates in the system under a certain pressure, depending on the condensation temperature. In a warm room, the gas easily turns into a liquid state in the radiator on the rear wall. In extreme cold, this process is disrupted, the pressure in the system drops, and the compressor cannot pump freon effectively.
The second critical point is the system No Frost. In standard mode, evaporator defrost is activated by a timer or hour meter. However, if the room is cold, snow may not form on the evaporator, but the timer will still start the heater. This leads to excess heat entering the chamber, and the thermostat does not allow the compressor to turn on in time.
⚠️ Attention: Operating the refrigerator at temperatures below +5°C without modification can lead to the oil in the compressor solidifying and jamming when trying to start.
In addition, electronic control modules may incorrectly read sensor readings if the difference between the temperature in the chamber and outside is minimal. This causes chaotic switching on and off, which negatively affects the resource of the start-up protection relay start protection relay.
Modification of the evaporator defrost system
The most common problem in a cold room is the incorrect operation of the defrost heating element. The refrigerator should switch to winter operating mode automatically, but many models require manual activation or physical blocking of the sensor to prevent unnecessary heating cycles.
The essence of the modification often comes down to installing an additional thermostat or changing the position of the existing defrost sensor. Some technicians recommend isolating the sensor from direct contact with cold air if it is poorly positioned. This allows the system to think that the evaporator is warmer than it actually is, and not turn on the heating unnecessarily.
Technical details of the heating element's operation
The defrosting heating element usually has a power of 150 to 400 W. In winter, its operation should be kept to a minimum, since snow does not form on the evaporator due to low humidity and air temperature.
To implement this task you will need:
- 🔧 A set of screwdrivers and a multimeter for testing circuits
- ❄️ Thermostat with a range response below +5°C
- 🧵 Heat-shrinkable tube for contact insulation
- 📏 Insulating tape and clamps for fastening
The modification process begins by disconnecting the device from the network. Then the back panel of the freezer is removed. Locate the defrost sensor (usually attached to the evaporator) and carefully remove it. If you install an external thermostat, its contacts cut into the power circuit of the heating element. This ensures that the heater will turn on only when it is actually needed, and not on a timer signal.
Installing a winter compressor kit
If your refrigerator is intended to be installed in an unheated area, it is critical to ensure that the compressor is operating correctly. A winter kit (or winter road) is a device that heats the compressor crankcase and the refrigerant stopping zone before starting.
The principle of operation is simple: while the refrigerator is standing, a special heating element maintains the oil temperature in the compressor above the freezing point and viscosity. This prevents water hammer and ensures normal lubrication of rubbing parts at the time of start.
By timer
| Component | Function | Switching temperature |
|---|---|---|
| Heater crankcase | Oil heating | +10°C...+15°C |
| Drainage heating element | Condensate removal | Below 0°C |
| Blowing fan | Circulation heat |
Installation of such a kit requires connection to the electrical circuit of the compressor. It is important not to confuse phase and zero, and also to reliably ground metal elements. Often, a winter kit is sold as a separate accessory for specific brands, such as Indesit or Atlant.
☑️ Checking the installation of the winter road
After installation, be sure to check the current consumption. It must not exceed the nominal values indicated on the motor nameplate. If you hear a buzzing or vibration, immediately turn off the device and check the fastenings.
Adjusting the thermostat and sensors
The thermostat is the “brain” that decides when to turn on the cold. Under normal conditions, it reacts to the temperature inside the chamber. But in winter, when it’s cold around, he needs help. Sometimes it is necessary to adjust the adjustment screw or replace the thermostat itself with a model with a different range.
Mechanical thermostats have an adjustment screw, access to which is often closed with a seal. By rotating it, you can change the temperature difference between switching on and switching off. However, this must be done extremely carefully, making a quarter turn at a time and checking the result.
In electronic systems everything is more complicated. There the parameters are hardwired into the module memory. To change them, you may need to enter the service menu. Login key combinations vary from manufacturer to manufacturer. For example, for some models LG you need to simultaneously hold down the lock and defrost buttons.
⚠️ Attention: Independently changing parameters in the service menu can lead to resetting the factory settings and incorrect operation of the electronics. Write down the initial values before making changes.
If you are not confident in your abilities, it is better to limit yourself to installing an external thermostat, which will forcefully turn on or off the power of the refrigerator depending on the room temperature. This is a rougher, but safer method.
The problem of the freshness zone and zero chamber
The so-called “zero chamber” or freshness zone deserves special attention. It maintains a temperature of about 0°C...+2°C. In winter, when the room is cold, it becomes difficult to achieve such a temperature, since almost no heat comes from outside.
As a result, food in this area may freeze. The solution to the problem often lies in blocking the cold air supply channels. If the damper that regulates the air flow from the freezer to the freshness zone remains open, the temperature there will drop below normal.
To redo the system, you can:
- 🚫 Partially block the air supply damper with cardboard or insulator
- 🌡️ Reconfigure the sensor freshness zone, shifting its readings
- 💡 Install an additional heating lamp (rarely, but sometimes necessary)
It is important to understand that microclimate in the chamber must remain stable. Sudden changes in temperature will lead to spoilage of delicacies. Use a thermometer to monitor for several days after modification.
Insulation and sealing of the circuit
Even if you have configured the electronics, physical heat transfer has not gone away. If the refrigerator is in a draft or against a cold wall, it will lose heat faster. In winter conditions this may even be a plus, but only to a certain extent.
Check the door seals. In the cold, rubber hardens and loses elasticity. If the door does not fit tightly, moist air will get inside, which will immediately turn into an ice crust. Lubricate the seals with silicone grease to preserve their properties.
You should also pay attention to the thermal insulation of the case. If the model is old, the polyurethane foam layer may have peeled off or become saturated with moisture. In this case, the operating efficiency decreases and the compressor wears out. Additional insulation on the outer walls (if the design allows) can help, but it is important not to cover the vents.
⚠️ Attention: Do not tape the vents on the back wall or sides. Impaired air circulation around the condenser will lead to overheating of the compressor, even in winter.
Sometimes a simple rearrangement helps. Move the refrigerator away from a window or door leading outside. A stable, albeit low, temperature is better than constant changes from opening the window.
Common mistakes during remodeling
The desire to save on electricity or adapt equipment to harsh conditions often leads to mistakes. The most common of them is completely disabling the defrost system. This seems logical: there is no snow, why heat it? But there is always moisture in the air, and it will settle on the cold evaporator, turning into an ice shell.
Another mistake is using unsuitable heaters. A regular nichrome spiral can overheat and cause a fire. Use only certified components intended for household appliances.
Also, do not forget about condensation. The water flowing into the drainage tray will freeze in the cold and create an ice plug. As a result, during the next defrost, water will flow over the edge of the tray directly onto the floor or inside the cabinet. The drainage tube sometimes has to be equipped with a heating cable, similar to those installed on roof drains.
FAQ: Frequently asked questions
Is it even possible to keep a refrigerator on the balcony in winter?
Technically it is possible, but only if the balcony is glazed and the temperature there does not drop below the minimum permissible, specified in the instructions (usually +5°C or +10°C). To operate at subzero temperatures, serious modifications described above are required.
Why does the refrigerator not turn on in the cold?
Most likely, the thermostat protection is triggered. He “sees” that the room is cold and believes that cooling is not required. It is also possible that the oil in the compressor has solidified, which creates too much resistance to start.
Do you need to defrost your refrigerator more often in winter?
If you live in a region with high humidity and often open the door, then yes. But if the refrigerator is rebuilt correctly and is in a cold room, the snow will freeze less. Monitor the thickness of the ice on the evaporator visually.
Will the modification consume more electricity?
Paradoxically, a properly modified refrigerator will save energy. The compressor will turn on less often, since it will not need to compensate for heat inflows, and the defrosting heating element will not work in vain. However, the heaters of the winter set consume current constantly in standby mode.
Is it dangerous to do this yourself?
Any intervention in the electrical circuit carries the risk of electric shock or fire. If you do not have experience working with a multimeter and electrical circuits, it is better to entrust this work to a professional technician or use ready-made factory solutions.