Refrigerators of the brand Polyus, once popular in the post-Soviet space, are distinguished by their simplicity and maintainability, but with age their control systems begin to fail. Often, owners are faced with a situation where the forced defrost button stops working, gets stuck, or, conversely, prevents the unit from exiting the defrost mode. The question of how to disable the defrost button becomes relevant when the mechanism fails and interferes with the normal operation of the compressor.
In this article we will analyze in detail the design of the defrost system, consider the causes of malfunctions and offer several ways to solve the problem, including temporary and radical measures. You will learn where to look Evaporator heating elementhow to check the integrity of the circuit and whether it is worth completely eliminating the button from the circuit.
Before you start disassembling, it is important to understand that completely ignoring the defrost system can lead to compressor failure due to water hammer or overload. Therefore, the approach must be balanced, and the actions must be technically competent.
The principle of operation of the defrost system in Polyus refrigerators
Refrigerators Polyus, depending on the model, can be equipped with both a manual and semi-automatic defrosting system. In classic two-chamber models, it is often used defrost button, which mechanically or electrically opens the compressor circuit and turns on the heating element. When you press the button, the cooling stops and the ice melting process on the evaporator starts.
In more modern modifications or models with a system No Frost (although this is rare for Polyus, a drip system is more common) the process is controlled by a timer and thermostat. However, in the context of your request, we are considering a mechanical or electromechanical button that requires manual intervention or fixation in a certain position. Thermoregulator in such schemes it plays a secondary role, controlling only the temperature after the cycle is completed.
If the button fails, it may not “snap” back, leaving the refrigerator in defrost mode, or not turning on, blocking the start of the compressor. Understanding this logic is necessary to correctly select a method for disconnecting or replacing an element.
⚠️ Attention: Before any work inside an electrical appliance, be sure to disconnect it from the network! Working with 220V voltage without the appropriate qualifications and tools is deadly.
Diagnostics of defrost button malfunction
The first step before deciding to disconnect or replace it is necessary to accurately determine the nature of the breakdown. Often the problem lies not in the button itself, but in oxidized contacts or a broken wire going to defrost heater. A visual inspection may reveal melted plastic or burn marks, which indicates overload.
For accurate diagnosis, you will need a multimeter. It is necessary to “ring” the button in different positions. In normal condition (cooling mode), the contacts should be closed, allowing current to flow to the compressor. In defrost mode, the compressor circuit opens and the heating element circuit closes. If the device shows an open where there should be a circuit, or a short circuit, the element requires replacement.
Sometimes the button is physically intact, but the mechanism is jammed due to moisture or ice crystals. In such cases, carefully warm the button body with a hairdryer (without overheating!) or treat it with contact spray, but this is only a temporary measure.
- 🔌 Checking the contacts: Make sure that the wires are tightly seated in the button terminals and do not have oxides.
- ❄️ Visual inspection: Look for cracks or marks on the button body reflow.
- 🔊 Sound test: When pressed, a working button makes a clear click, the absence of sound indicates a mechanical defect.
Methods of temporary disabling button
If the defrost button is stuck in the “on” position and the refrigerator has stopped freezing, and there is no new part at hand, you can use the method of temporarily removing the element from the circuit. The essence of the method is to create a bypass (jumper) that will pass current directly to the compressor, bypassing the faulty switch.
To do this, you need to get to the electrical circuit of the refrigerator, usually located at the top or rear of the unit. Locate the wires going to the button. You will need to connect those contacts that are responsible for the operation of the compressor in normal mode. This will allow you to start refrigeration circuit and restore cooling.
It is important to understand that with this connection the defrosting function completely disappears. You will have to defrost the refrigerator manually by unplugging it for 10-12 hours, when a significant “fur coat” forms on the evaporator. Ignoring this rule will result in ice completely blocking the air channels.
This method is only suitable as an emergency measure before purchasing new spare parts. Long-term operation of the refrigerator Polyus with a permanently running compressor without defrosting cycles (if they are provided for by the design) can reduce the engine life.
Complete removal of the button and direct connection
A radical solution to the problem is the complete removal of the button from the wiring diagram. This option is often chosen by owners of older models who prefer to control the defrosting process manually using a timer or visual inspection. In this case, the button is simply bitten out, and the wires going to it are connected directly.
Technically it looks like this: you define the input wire (phase) and the output wire going to the compressor. Connect them together, ensuring reliable contact. In this case, it is better to insulate and remove the wires that led to the defrost heater (if they were separate) to prevent accidental activation of the heating element.
After such an upgrade, the refrigerator will operate as a regular unit without the automatic or semi-automatic defrosting function. You will need to ensure that the thickness of the ice on the back wall does not exceed 5-7 mm. As soon as the layer becomes thicker, the refrigerator is disconnected from the outlet until the water has completely drained.
| Parameter | Before removing the button | After removing the button |
|---|---|---|
| Operating mode | Automatic/Semi-automatic | Manual control |
| Risk of overload | Low (if the button is working) | High (if you forget to defrost) |
| Difficulty of repair | Requires searching for spare parts | Minimum (soldering of wires) |
| Energy consumption | Standard | May increase with ice fouling |
Searching and replacing the evaporator heating element
Often the question “how to turn off the button” arises because the system does not see the completion of defrosting, and the button (or thermostat) does not switch modes. The cause may be a burnt Evaporator heating element. If the heater does not work, the ice does not melt, and the user thinks that the problem is in the button.
To replace the heating element in the refrigerator Pole you will need to remove the back panel of the freezer. It is usually secured with self-tapping screws or plastic latches. After removing the panel, access will open to the evaporator - a ribbed grid entangled with tubes.
The heating element can be built into the evaporator structure or mounted separately under it. Check it with a multimeter: the resistance of a working heating element is usually from 200 to 400 Ohms (depending on the power). If the device shows infinity (break), the heater must be replaced.
Where can I find the heating element marking?
Markings are often applied to the metal body of the heater or to a tag attached to the wires. Look for power (W) and voltage (V) designations.
Setting up the thermostat after upgrading
If you decide to disable the defrost button and switch to manual control, it is important to configure it correctly thermostat. As automatic defrost cycles disappear, the load on the compressor may change. It is necessary to ensure that the thermostat correctly turns off the compressor when the desired temperature is reached.
In some cases, after removing the button from the circuit, it may be necessary to slightly adjust the thermostat settings to compensate for the change in heat transfer. However, in most refrigerators Pole the thermostat operates independently of the defrost button, opening the compressor power circuit when a low temperature is reached.
Monitor the temperature in the freezer. If it no longer maintains the desired mode (below -18°C), perhaps ice has begun to accumulate on the evaporator, reducing the efficiency of heat transfer. In this case, manual defrosting is required.
☑️ Check after turning off the button
Common mistakes during self-repair
Independent repair of refrigerators, especially old models like Poleis associated with risks. One of the most common mistakes is trying to “jam” a button in a certain position using tape or glue. This is strictly prohibited, as it can lead to melting of the plastic and a fire due to heating of the contacts.
Another mistake is ignoring the state of the wire insulation. Old wiring in refrigerators often becomes dull and cracks. When tampering with the circuit, it is easy to damage the insulation, which will lead to a short circuit to the refrigerator body. This makes the operation of the device dangerous to life.
Also, do not forget about freon. If you carelessly dismantle the freezer and remove ice with sharp objects (knife, screwdriver), you can damage the evaporator tubes. A refrigerant leak will cause the refrigerator to stop freezing, and repairs will require calling a technician with vacuuming and charging equipment.
⚠️ Attention: Never use sharp metal objects to remove ice from the evaporator! Damage to the freon tube will lead to expensive repairs, which are often not economically feasible for old refrigerators.
When is the best time to call a specialist?
Despite the apparent simplicity, there are situations when it is better not to take risks. If you are not confident in your skills in working with electricity, if the wiring in your house is old, or if after your manipulations the refrigerator makes strange sounds, call a specialist.
You also need the help of a professional if the problem is not in the button, but in starting relay or the compressor itself. The symptoms may be similar (the refrigerator does not turn on), but diagnosis requires special equipment. The technician will be able to accurately determine whether it is worth repairing the old one Polyus or is it easier to purchase new equipment.
Remember that the safety of you and your loved ones is always more important than saving on repairs. If you smell burning, see sparking or hear a crackling sound, immediately unplug the appliance.
Is it possible not to defrost the Polus refrigerator at all after removing the button?
No, it is not possible. If you have removed the button, you have removed the forced defrost mechanism. Ice will continually accumulate on the evaporator. Once every 3-6 months (depending on the humidity in the room and the frequency of opening the doors), it will be necessary to completely disconnect the refrigerator from the network and leave it with the doors open until the ice completely melts.
Where to buy a defrost button for the Polus refrigerator?
Since the equipment Pole is no longer produced, new original spare parts difficult to find. You should look in stores of spare parts for household appliances, on radio markets or ad sites (Avito and analogues), where they sell disassembled parts. Universal buttons with similar current and voltage parameters are often suitable.
Why does the defrost button get hot?
Heating of the button indicates poor contact inside it or at the junction of the wires. Resistance at the point of poor contact increases, causing heat. This is a fire hazard. The heated button must be replaced immediately, and the wires cleaned and connected securely.
How often should you defrost a refrigerator without a button?
Without an automatic defrosting system, it is recommended to defrost the refrigerator when a visible crust of ice 3-5 mm thick appears. This usually happens once every 2-4 months, but depends on the tightness of the door seals and the frequency of use of the unit.
Does removing the button affect energy consumption?
Removing the button itself does not affect consumption. However, if you forget to defrost your refrigerator manually, the layer of ice will act as a heat insulator. The compressor will have to work longer and more often to maintain the temperature, which will lead to increased energy consumption.