How to properly connect a thermostat to a model 59 refrigerator: step-by-step instructions with diagrams

Connecting a thermostat (thermostat) to a refrigerator model 59 is a task faced by both professional craftsmen and equipment owners who decide to save on repairs. This procedure requires not only precision in working with electrical contacts, but also an understanding of the principles of operation of the cooling system. Depending on the manufacturer (for example Atlant 59-120, Birusa 59 or Snaige 59), the connection diagrams may differ slightly, but the general logic remains the same.

The main difficulty is that a thermostat is not just a switch, but a device that analyzes the temperature in the chamber and controls the operation of the compressor. Incorrect connection can lead to incorrect operation of the refrigeratora constant hum of the compressor or, conversely, a lack of cooling. In this article we will analyze step-by-step instructions, provide typical connection diagram, and also point out common mistakes that beginners make.

Before you begin, make sure that you have all the necessary tools and spare parts. If the thermostat is being replaced due to failure, check that the new part is compatible with your model. For example, for refrigerators Atlant 59 thermostats are often used K-59 or TAM-133, but for an accurate selection it is better to check the technical documentation.

1. Preparation for connection: tools and safety measures

Before disassembling the refrigerator, disconnect it from the network wait for complete defrosting (if the chambers are covered with ice). Working with electrical components in a damp environment is dangerous! Also prepare the following tools:

• 🔧 Screwdrivers (phillips and flat) - for dismantling the control panel.
• 🔌 Multimeter - to check the integrity of the circuits and the functionality of the new thermostat.
• 🔗 Soldering iron and solder (if necessary) - if the wires are oxidized or contacts need to be replaced.
• 📸 Camera or smartphone - to photograph the initial connection of the wires.

Pay special attention wire markings. Model 59 refrigerators usually use wires of the following colors:

• 🔴 Red - phase (220V power supply).
• 🔵 Blue - zero.
• 🟡 Yellow or green - grounding.
• 🟠 Orange/brown - signal wire from the temperature sensor.

⚠️ Attention: If your refrigerator was manufactured before 2010, it may not have grounding. In this case, do not connect the yellow-green wire to the body - this may result in a short circuit!

Before dismantling the old thermostat, take a photo of its connection or draw a diagram. This will help avoid confusion when reassembling. If you are working with a model Birusa 59, please note that in some modifications the thermostat is combined with a compressor protection relay - it will also have to be temporarily turned off.

2. Removing the old thermostat: step-by-step instructions

To get to the thermostat, remove the top cover of the refrigerator or the control panel (depending on the design). In models Atlant 59 the thermostat is usually located behind the adjustment knob, and in Snaige 59 - inside a plastic box next to the evaporator.

Dismantling algorithm:

1. Remove the temperature adjustment knob (it can be attached to latches or screw).
2. Unscrew the screws securing the thermostat protective casing.
3. Carefully disconnect the terminals with wires, remembering their location.
4. Remove the thermostat from the seat by pulling it towards you.

If the wires stuck or oxidized, do not pull them - this may damage the contacts. It is better to use a soldering iron or a special liquid to clean the contacts (for example, Contact Cleaner).

Check the integrity of the wire insulation|Make sure that the new thermostat is compatible with model 59|Clean the contacts from oxidation|Take a photo of the connection diagram-->

3. Connection diagram of the thermostat to the refrigerator 59

A typical thermostat connection diagram in model 59 refrigerators is as follows:

In some models (for example, Birusa 59-101), a simplified circuit without a signal wire can be used. In this case, the thermostat controls the compressor directly, without additional sensors. To make sure the connection is correct, check the resistance between the contacts 3 and 4 at different positions of the adjustment knob:

• 🔄 In the position 0 (off) - the resistance should tend to infinity (open circuit).
• 🔄 In the position Max - the resistance is close k 0 Ohm (closed circuit).

⚠️ Attention: If, during testing, the multimeter shows a short circuit in any position of the knob, the thermostat is faulty and must be replaced!

For refrigerators with electronic control (for example, Snaige 59E), the connection diagram may include an additional control unit. In this case, the thermostat is connected to the board and not directly to the compressor. Refer to the markings of the connectors: usually they are labeled as THERM or TEMP SENSOR.

What to do if the wires are do not match the colors?

If your refrigerator uses wires of other colors, be guided by their location in the terminal block. The main thing is to connect the phase (usually from the compressor) and zero correctly. To check, use a multimeter in continuity mode: when the thermostat is on, there should be a resistance of ~0 Ohm between the phase and the neutral wire.

4. Connecting a new thermostat: nuances for different models

Installing a new thermostat is done in the reverse order, but there are several key points that depend on the specific refrigerator model:

• 🏷️ Atlant 59: The thermostat is secured with two screws. After connecting the wires, make sure that the adjustment knob rotates smoothly, without jamming.
• 🏷️ Birusa 59: In some modifications the thermostat is combined with a protection relay. When replacing, check that the relay contacts do not touch the housing.
• 🏷️ Snaige 59: If the model has an electronic display, after connecting the thermostat, you may need to reset errors through the service menu (press the buttons Super Cool + Super Freeze for 5 seconds).

After connecting all the wires, fix the thermostat in the seat and install the protective cover in place. Do not use excessive force when tightening the screws - this may damage the plastic housing of the thermostat.

Critical error: connecting the phase and zero in reverse polarity will cause the compressor to operate continuously without turning off. This can lead to overheating and failure. out of order!

Before turning on the refrigerator for the first time after repair, perform the following steps:

1. Make sure that the thermostat adjustment knob is in position 0 (off).
2. Connect the refrigerator to the network.
3. Smoothly turn the knob to the middle value (usually 3).
4. Listen to the compressor: it should start in 1-2 minutes.

5. Functionality check and calibration

After connecting the thermostat, you need to check whether it controls the operation of the compressor correctly. To do this:

1. Set the thermostat knob to position Max (maximum cooling).
2. Place the thermometer in the main chamber of the refrigerator.
3. After 2-3 hours, check the temperature: it should drop to +2…+4°C.
4. Move the knob to position 1 (minimum cooling) and wait until the compressor turns off.

If the refrigerator does not turn off or, conversely, does not turn onthe following problems are possible:

In refrigerators with electronic control (for example, Snaige 59E) you may need thermostat calibration. data-i="175">thermostat calibration

1. Enter the service menu (usually hold the button Super Freeze 10 seconds).
2. Select item Calibration or Temp Adjust.
3. Follow the instructions on the display to set the threshold values.

⚠️ Attention: If your refrigerator is equipped with a system No Frost, after replacing the thermostat, you may need to reset the defrost timer. Otherwise, the fan will run continuously, which will lead to icing of the evaporator.

6. and how to avoid them

Even experienced craftsmen sometimes make mistakes when connecting a thermostat. Here are the most common ones:

• 🔌 Inverted phase and zero: Leads to constant operation of the compressor or its complete failure. Always check the connection with a multimeter!
• 🔧 Poor contact: Oxidized or loose terminals cause sparking and overheating. Clean the contacts before connecting.
• 📉 Incorrect calibration: If the thermostat is adjusted too low, the compressor will work overtime, which will shorten its life.
• 🔄 Ignoring the defrost sensor: In models with No Frost they forget to connect the evaporator sensor, which leads to icing.

To avoid these problems, follow a simple rule: check each action twice. For example, after connecting the wires, check the diagram again and test the circuit. If you are working with a refrigerator Birusa 59, pay attention to the terminal markings - in some modifications, the contact 6 is used to connect an additional relay, not a sensor.

Another typical mistake is use of an incompatible thermostat. For example, a thermostat from Atlant 59 may not be suitable for Snaige 59 due to different temperature control ranges. Always check the technical specifications. characteristics:

• 📋 Adjustment range (for example, -12…+10°C).
• 📋 Type of fastening (screw or snap-on).
• 📋 Availability of additional contacts for sensors.

7. When is the best time to contact a technician?

Although replacing the thermostat is one of the simplest repair operations, in some cases it is better to trust it. to a professional:

• 🔧 If the refrigerator uses electronic control unit with a complex connection scheme (for example, Snaige 59E or LG with an inverter compressor).
• 🔌 If, when checking with a multimeter, problems in the compressor circuit (for example, a winding break or an interturn short circuit).
• 📉 If after replacing the thermostat, the refrigerator does not cool, but the compressor is working (a freon leak is possible).

The cost of replacing the thermostat at a service center ranges from 1500 to 3000 rubles (depending on the region and model of the refrigerator. If you are not confident in your abilities, there may be a risk of damaging other components (for example, the control board). turn into more expensive repairs.

It is also worth contacting a specialist if:

• 🔍 You cannot find exact connection diagram for your model.
• ⚡ Refrigerator electric shock after replacing the thermostat (the insulation of the wires may be damaged).
• ❄️ Forms on the back wall snow "coat" (the problem may be in the defrosting system, and not in the thermostat).

Remember: warranty repair (if the refrigerator is still under warranty) automatically burns out with independent intervention. Before disassembling the equipment, check the warranty period in the passport. products.

FAQ: Frequently asked questions about connecting a thermostat

Is it possible to replace a mechanical thermostat with an electronic one?

Theoretically, yes, but this will require a complete rework of the control circuit. In most cases, this will be the case. is impractical, since an electronic thermostat requires connection to a control board, which may not be present in older models (for example, those produced before 2010). If you need precise temperature control, consider purchasing a new refrigerator with electronic control. Atlant 59 released before 2010). If you need precise temperature control, consider purchasing a new refrigerator with electronic controls.

How to check the thermostat without a multimeter?

If you don’t have it on hand. multimeter, you can use the “refrigerator method”:

1. Remove the thermostat from the refrigerator without disconnecting the wires.
2. Place it in a container with ice water for 5-10 minutes.
3. If the thermostat is working properly, you will hear a click (opening contacts).

However, this method does not give a 100% guarantee, since not all thermostats respond to water temperature.

Why does the new thermostat click, but the compressor does not turn on?

This may indicate several problems:

• Faulty compressor start relay (check it with a multimeter).
• Burned fuse in the compressor circuit.
• Open winding compressor (replacement required).
• Poor contact between the thermostat and the compressor (check the wires).

Start by checking the relay - it is located next to the compressor in a black plastic case.

Do you need to solder the wires when replacing the thermostat?

In most cases soldering is not required - the wires are connected through terminal blocks or connectors. only if:

• The contacts have oxidized and do not provide a reliable connection.
• The wires have broken off at the base.
• You are replacing the thermostat with a non-original one, which has a different wiring of contacts.

When soldering, use rosin and solder with a low melting point so as not to damage the insulation of the wires.

Which thermostat is suitable for the Atlant 59-120 refrigerator?

The following thermostats are suitable for this model:

• K-59 (original, mechanical).
• TAM-133-1M (analogue, interchangeable).
• Danfoss 077B6344 (imported analogue, requires modification of the fastening).

When purchasing, please specify that the thermostat should be 220V and have adjustment range up to -12°C (for the freezer).