Many owners of household appliances are faced with a situation where it is necessary to temporarily or permanently turn off the freezer compartment in an old refrigerator. This may be necessary for defrosting, eliminating unpleasant odors, after repairs, or if you plan to use the unit solely as a refrigerated drinks cabinet. In older models, such as ZIL or Saratov, the temperature control system is designed differently than in modern No Frost systems, which requires a special approach.
Before taking any actions, It is important to understand that complete shutdown installing a freezer evaporator on a permanent basis in a working refrigerator is technically difficult and often impractical without intervention in the design. However, if your goal is proper defrosting or temporarily stopping the production of cold in the upper chamber, there are a number of proven methods. Let's look at them in detail and safely for your equipment.
It is worth noting right away that in most older models the freezer is an integral part of the refrigeration circuit. This means that the refrigerant circulates throughout the entire system, and it is not always possible to simply “turn off” the cold in one part, leaving it in another, through a standard thermostat. In single-compressor systems, it is physically impossible to completely stop the cooling freezers while the compressor is running. Therefore, “turning off” most often means either a complete stop of the unit for defrosting, or a transfer to the minimum cold mode.
Preparation for the shutdown and defrosting procedure
The first and most important stage is preparation. If you plan to turn off the freezer for defrosting, you need to empty the chambers of food. In older refrigerators, the ice crust can be quite thick, and its melting will produce a large amount of water. Prepare rags, basins in advance and check the drain hole, if provided by the design.
Safety is priority number one. Before starting any manipulations with the internals, or even just before deep cleaning, the device must be de-energized. Unplug the plug from the socket. Make sure that the power cord is not stretched or lying on a wet floor. In older models, the insulation of the wires could have dried out, so a visual inspection of the cable will not be superfluous.
For effective work, prepare the following equipment:
- 🧊 Several deep containers for collecting melt water.
- 🧽 Sponges and soft rags to remove moisture.
- 🧤 Rubber gloves to protect your hands from cold and dirt.
- 📦 Boxes or cooler bags for temporary storage of food.
Do not try to speed up the thawing process by using a hairdryer or hot water. Sudden temperature changes can damage the plastic of the inner cabinet or cause cracks in the evaporator tubes. Natural defrosting takes longer, but guarantees the safety of the equipment.
Use of standard temperature controllers
In old refrigerators, control is often carried out by a mechanical thermostat. This is a device that closes and opens the compressor power circuit depending on the temperature in the chamber. On the front panel there is usually a knob with divisions from 1 to 5 or 7. To minimize the operation of the freezer, you need to turn the knob to the minimum position.
If you turn the thermostat knob to the “0” or “Off” position (if there is one), the compressor will stop starting. In this case, the entire refrigerator will turn off, including the main chamber. This is the standard way to completely disable it. However, if your goal is to leave the main chamber working and “silence” the freezer, then in single-compressor systems this is almost impossible to do using standard means.
In two-chamber models with one compressor (for example, some modifications Atlant or Minsk), the cold is distributed through the channels. By adjusting the damper, you can change the air flow, but you will not be able to completely remove the cold from the freezer compartment. The temperature there will always be lower than in the refrigerator compartment.
Mechanical intervention: dismantling and insulation
There are radical methods that are resorted to when It is necessary to use the old refrigerator only as a cooling cabinet, completely ignoring the freezer. This is often done when converting equipment into bars or specialized cabinets. One option is to physically disconnect or isolate the freezer evaporator, but this requires skill.
It is important to understand the risks. If you break the tightness of the refrigeration circuit, the freon will evaporate and the refrigerator will stop cooling completely. Repair will require calling a technician, evacuation of the system and charging with refrigerant. Therefore mechanical shutdown is considered only if you are prepared for the possible failure of equipment or have the qualifications of a master.
A more gentle, but labor-intensive method is thermal insulation. Some craftsmen try to seal the cold air supply channels into the freezer with heat-insulating materials, but in older models with natural circulation this will disrupt all heat exchange. The main chamber will stop cooling, and the compressor will work without stopping, trying to reach the set temperature.
Risks of independent intervention in the circuit
An attempt to cut through the tubes or disconnect the evaporator without professional equipment will lead to the release of freon. Restoring functionality will cost more than buying a used refrigerator.
Features of different types of old refrigerators
Old refrigerators are divided into several types, and the approach to them is different. Let's look at the main categories so that you understand what you are dealing with.
The first type is single-compartment refrigerators with a freezer compartment in the form of a box (“freezer-cabinet”). In them, the evaporator is often both the wall of the freezer and cools the main chamber through a partition. There is no way to turn off the freezer separately except by turning off the entire device.
The second type is a two-chamber type with a drip system. Here the evaporator is located behind the back wall or at the top. Air circulation occurs naturally. Blocking the channels in such models will lead to overheating of the compressor.
| Refrigerator type | Possibility of separate shutdown | Recommended method |
|---|---|---|
| Single chamber (ZIL, Biryusa) | Impossible | Completely turning off or ignoring the freezer |
| Two-chamber (1 compressor) | Partially (by damper) | Adjusting the thermostat to minimum |
| Two-compressor | Possible | Disabling one thermostat |
| No Frost (old models) | Difficult | Only software (if yes) |
Two-compressor models stand apart, which were rare in the USSR, but were present in later imported or transitional models. If your refrigerator has two motor-compressors and two thermostats, then the problem is solved simply: you turn off the power to one of the circuits. However, 99% of old Soviet and post-Soviet refrigerators have only one compressor.
Problems with the thermostat and their solution
Often the desire to “turn off the freezer” arises due to a malfunction. For example, the thermostat is stuck and the compressor does not turn off, freezing everything in the main chamber and creating an ice shell in the freezer. In this case, you do not need to turn off the camera, but change the temperature sensor.
Replacing the thermostat is a procedure accessible to a person with hands. First you need to find the model of your regulator (it is written on the body). Then turn off the power to the refrigerator, remove the regulator handle, unscrew the fastening nut and carefully remove the capillary tube from the evaporator.
Install a new regulator, secure the tube in the same place (this is critical for correct operation), and assemble the control panel. After turning on, the refrigerator will begin to work correctly, maintaining the set mode, and the problem of “perpetual freezing” will disappear.
⚠️ Attention: When replacing the thermostat, make sure that the capillary tube is not bent or damaged. This is a thin element, and its damage will damage the new regulator instantly.
Operation rules after shutdown
If you decide to use the old refrigerator in a limited mode (for example, only the refrigeration compartment), monitor the condition of the compressor. Constant wear and tear, if you have somehow blocked the outflow of cold, can lead to overheating and combustion.
Check the door seals regularly. In older models, the rubber often dries out. If the door does not close tightly, the compressor will thresh without interruption, trying to catch up with the temperature, which will lead to the formation of a fur coat in the freezer even with minimal settings.
- ❄️ Check for frost on the back wall once a week.
- 🔊 Listen to the motor: the hum should be smooth, without knocks and clicks.
- 🌡️ Use an external thermometer to monitor the temperature in the main chamber.
☑️ Checking the condition of the refrigerator
FAQ: Frequently asked questions
Is it possible to completely remove the freezer box from a single-chamber refrigerator?
It is impossible to physically cut out or dismantle the evaporator (freezing box) in a single-chamber refrigerator without losing the refrigerant and breaking the tightness of the system. This will require professional refilling. It’s easier not to use this compartment, but there will still be cold there.
Why did the refrigerator stop cooling after turning off the freezer?
Most likely, you have disrupted the air circulation or blocked the channels through which cold air enters the main chamber. In older systems, the freezer is often the “generator” of cold for the entire volume. Return everything to its original state.
How long does it take to defrost an old refrigerator?
It may take 12 to 24 hours to completely defrost a thick layer of ice in older models. Do not rush the process, leave the doors open and ensure the room is ventilated.
Is frequent switching on and off harmful to the compressor?
Yes, frequent start-stop cycles are harmful to the starting relay and compressor windings. Older models are especially sensitive to this. If you turn off the refrigerator manually, do it less often, but for longer periods, if food storage allows it.
⚠️ Attention: Operating refrigeration equipment with damaged insulation or homemade modifications to the circuit can be a fire hazard. If you are not confident in your actions, it is better to purchase a specialized cabinet.