Faced with the need to adjust the temperature setting, many users ask the question: what is colder in refrigerator 1 or 5? The answer to this question is critical to proper food storage, but it depends on the type of control system installed. In most modern models of the mechanical type, where adjustment is carried out by a rotary knob, the number 5 indicates maximum cooling, while the unit corresponds to the minimum operating mode of the compressor.
However, there are exceptions, especially in old Soviet models or specific industrial series, where the logic can be inverted. That is why blindly following the rule “the higher the number, the colder” without checking the instructions can lead to food spoilage or even freezing of vegetables in the main chamber. Understanding the operating principle of your thermostat thermostat will help you avoid common operating mistakes.
In this article we will look in detail at how the temperature scale works, why the compressor works cyclically and how to find the “golden mean” for energy efficiency and food preservation. You will learn what factors affect the temperature inside the chambers and how to independently check the correct operation of the device without using complex equipment.
The principle of operation of a mechanical thermostat
A mechanical temperature controller, or thermostat, is a simple electromechanical device. Inside it there is a sensitive element - a bellows filled with gas or liquid, which reacts to changes in temperature in the evaporator. When you turn the knob to the setting 5, you physically change the tension of the spring, causing the contacts to close at a lower temperature inside the chamber.
This means that when you set the knob to the maximum value, the compressor will run longer, not turning off until the temperature drops to extremely low levels. On the contrary, position 1 or Min opens the motor power supply circuit when only a slight drop in temperature is achieved, which causes the unit to stop frequently.
⚠️ Attention: Prolonged operation of the compressor at maximum power (mode 5 or 7) without interruptions can lead to its overheating and premature failure. Do not use maximum cooling all the time unless absolutely necessary.
It is important to understand that the numbers on the scale are not degrees Celsius, but standard units of cooling power. There can be a difference of 4–6 degrees between one and five, which is significant for storing meat or dairy products. The exact calibration depends on the manufacturer and the specific model of your refrigerator.
Electronic control versus mechanics
With the development of technology, manufacturers have switched to electronic control panels, where the question “which is colder” disappears by itself. In modern models with a display, you set a specific temperature in degrees Celsius, for example +4°C or -18°C. There are no abstract numbers from 1 to 7, which eliminates confusion.
Electronics allows you to set independent modes for different zones. While it is maintained in the main chamber +3°C, in the zero zone it can be 0°C, and in the freezer -24°C. A mechanical thermostat, as a rule, regulates only one zone (usually the refrigerator compartment), and the freezer operates on the residual principle or has its own separate, but also mechanical regulator.
If your control panel has “+” and “-” buttons or the ability to enter numbers, then you are dealing with an electronic system. In such devices, trying to turn an imaginary knob or look for hidden mechanical switches is pointless. Control is carried out through touch screen or a keypad, often hidden behind the door.
Why is there no knob in the electronics?
Electronic sensors (thermistors) transmit data to the control board, which itself decides when to turn on the compressor. This ensures more accurate temperature maintenance with an error of up to 0.5 degrees, in contrast to mechanics, where the spread can reach 2-3 degrees.
Despite the convenience, electronics are more sensitive to power surges in the network. If your refrigerator with a display began to show an error or stopped freezing after a thunderstorm, the problem is most likely in the control board, and not in the thermostat.
Comparative table of cooling modes
To better understand the difference between the modes, consider the standard mechanical regulator scale, which is found in most brand models. Indesit, Atlant, Beko i Liebherr. The values may vary slightly depending on the chamber volume and external temperature.
| Handle position | Nature of operation | Approximate temperature in the chamber | Recommended use |
|---|---|---|---|
| 1 (Min) | Minimum cooling | +8...+10°C | Storage of vegetables, fruits, drinks |
| 3 (Average) | Normal mode | +3...+5°C | Daily food storage |
| 5 (Max) | Intensive cooling | 0...+2°C | Cooling a large volume of food |
| 6-7 (Super) | Frozen / Turbo | Below 0°C (risk) | Fast freezing, not for constant use |
As can be seen from the table, setting the regulator to 5 or higher creates conditions close to freezing of water. This is useful if you just brought a lot of food from the store and need to cool it quickly. However, for permanent storage of milk or eggs, this temperature may be excessive.
Mode 1 is often used in winter, when the temperature in the room where the refrigerator is located drops below +16°C. In such conditions, the compressor may not turn on at standard settings, since the difference between the temperature in the room and inside the chamber becomes too small.
Factors affecting the temperature inside the chambers
Even if you set the knob to the correct number, the actual temperature inside may differ from the expected one. There are many external and internal factors that force compressor to work under different loads. Understanding these nuances will help you optimize the operation of the device.
One of the key factors is the ambient temperature. If the refrigerator is placed in the kitchen next to a hot stove or in direct sunlight, the thermostat will register higher readings and cause the motor to work overtime even on the medium setting. At the same time, installing the device in an unheated garage in winter may cause it to stop turning on.
- 🧊 Chamber loading: An empty refrigerator cools down faster, but holds the temperature worse when the door is opened. Full shelves stabilize the microclimate.
- 🚪 Opening frequency: Each opening of the door lets in warm, moist air, causing the sensors to command increased cooling.
- ❄️ Condition of the seal: Worn rubber allows heat to pass through, which is why the unit works continuously, trying to compensate for losses.
- 🌬️ Air circulation: Clogged air ducts or too tight adherence of products to the back wall interfere with the distribution of cold.
It is also worth considering the technical system state. If there is not enough refrigerant (freon) in the circuit or a thick “coat” of ice has formed on the evaporator due to a malfunction of the defrost system, even the maximum setting of the regulator will not provide the required cold. In such cases, the number “5” on the handle will not correspond to the actual temperature.
⚠️ Attention: Never put hot or warm food in the refrigerator. This sharply increases the internal temperature, causing the compressor to work harder, and can lead to spoilage of food already lying nearby.
How to check the real temperature without a thermometer
It often happens that the scale on the thermostat is off, or you simply do not trust the readings of the device. There is a simple household way to check how cold it is in your refrigerator without buying special meters. This method is based on the physical properties of water and oil.
Take a regular glass of water and place it on the middle shelf, away from the walls. Leave for several hours. If the water is covered with a thin crust of ice, it means that you have set a mode close to 5 or higher, and the temperature is about 0°C or lower. If the water is at room temperature, the regulator is at a minimum or is faulty.
☑️ Checking the temperature
Another test involves sunflower oil. It begins to thicken and become cloudy at a temperature of about +5...+6°C. If the oil in a bottle standing on the shelf has become viscous, it means that the temperature in this zone is optimal for storing most products. If the oil remains liquid, the refrigerator is warmer +10°C.
For more accurate diagnostics, you can use a household alcohol thermometer (using mercury ones is dangerous!). Place it in a glass of water and place it on the middle shelf overnight. In the morning you will receive the exact value. The normal range for the main camera is considered to be from +2°C to +6°C.
Optimal settings for different seasons
Many users do not know that it is advisable to change the position of the thermostat knob depending on the time of year. This is due to a change in the temperature in the room and, as a consequence, a change in heat transfer.
In the summer, when the apartment is hot, the heat loss of the refrigerator increases. To compensate for this, you can slightly increase the cooling power by switching the knob from 3 to 4. However, you should not set the maximum, since in hot weather the compressor already works with increased load, and it does not need additional stress.
In winter the situation is the opposite. If the room is cool (about +18°C), the refrigerator will cool down faster. In this case, position 2 or even 1is sufficient to maintain the desired temperature. This will also help save energy and extend the life of the engine.
It is worth noting that modern models with system No Frost and electronic control often have built-in algorithms for compensation of external temperature, so manual adjustment in summer and winter is not required for them.
Frequent errors during setup refrigerator
Incorrect setting of the thermostat is one of the most common causes of equipment breakdowns and food spoilage. Users often make the same mistakes, not understanding the principle of operation of the device.
The biggest mistake is setting the knob to maximum (5, 6, 7) immediately after defrosting or loading food. People think that this will cool the camera faster. In fact, the compressor will work non-stop, trying to reach a minimum that is unattainable under the given conditions, which will lead to freezing of the evaporator and stopping the air circulation.
- 🔌 Ignoring the instructions: An attempt to adjust the refrigerator “by eye” without understanding the markings.
- 🌡️ Constant "Turbo" mode: Keeping the regulator at maximum all year round, which leads to excessive consumption of electricity.
- 📦 Sensor blocking: Placing products close to the temperature sensor (if visible), which distorts the readings.
Also an error is sudden switching modes. If you change the setting from 1 to 5, give the refrigerator 4-6 hours to stabilize before making any judgments about its performance. There will be no instant result.
What to do if the refrigerator does not freeze even at 5 degrees?
If the regulator is turned to the maximum, but there is no cold, check whether the door closes tightly, whether the condenser is clogged with dust at the back, whether the fan is working (can you hear a hum). If everything looks normal, there may be a freon leak or the thermostat itself has failed - you need to call a specialist.
Is it possible to store medicines in the refrigerator?
Only if the packaging has the appropriate markings and the temperature conditions are indicated (usually from +2 to +8°C). In mechanical refrigerators, the temperature can fluctuate, so for critical medications it is better to use a special thermobox or a separate pharmacy refrigerator.
Why do vegetables freeze in the box?
This is a sign that the temperature in the lower part of the chamber is too low. Try decreasing the thermostat value (from 5 to 3 or 2). Also check if the food is blocking the outlet for cold air.
Does the color of the cabinet affect the temperature inside?
Dark refrigerators installed in the sun become hotter, which causes the compressor to work harder. Light surfaces reflect heat. However, when installed away from direct sunlight, the color of the case does not play any role.