Replacing the temperature sensor in the Stinol refrigerator: a detailed guide with photos and nuances

The refrigerator Stinol has stopped maintaining the set temperature, does the compressor work without stopping or, conversely, does it turn on too rarely? The reason may lie in a faulty temperature sensor - a small but critical element of the system. Unlike service centers, where they will charge from 2,500 to 5,000 rubles for a replacement, you can do it yourself in 1–2 hours, saving your budget and gaining invaluable experience.

This article is not just an instruction, but a practical guide taking into account the features of Stinol refrigerators (series STN 165, STN 185, STN 200 etc.). We will look at how to accurately diagnose a breakdown, select a compatible sensor, carefully remove the old one and install a new one - without the risk of damaging the No Frost system or capillary tubes. And you will also find out why in 80% of cases the problem lies not in the sensor itself, but in the oxidized contacts of its connector —and how to fix it in 10 minutes.

Symptoms malfunction of the temperature sensor in the Stinol refrigerator

The temperature sensor (thermistor) in refrigerators Stinol is responsible for transmitting data about the current temperature in the chambers to the electronic control unit. If it fails, the system receives incorrect signals—or none at all. Here are the key symptoms that will indicate a problem:

• 🔄 The compressor works without interruptions - tries to cool the chamber to a “false” temperature, which is shown by a faulty sensor.
• ❄️ Frosting of the rear wall in models with a drip system or ice "coat" on the evaporator in No Frost - the sensor gives a signal about insufficient cooling.
• 🌡️ The temperature in the chambers does not correspond to the settings: for example, in the freezer +5°C instead of −18°C, or in the refrigerator compartment −3°C when set to +4°C.
• 🚨 Error E1, E2 or E5 on the display (in models with electronic control) - codes associated with faulty sensors.
• 🔇 The compressor does not turn on at all — the control unit “thinks” that the temperature has already reached normal.

Important: similar symptoms can be caused by failure of the electronic modulea freon leak or a jammed fan (in No Frost). To accurately confirm the fault of the sensor, you need to call with a multimeter —more on this in the next section.

⚠️ Attention: If the refrigerator Stinol with system No Frost, before diagnosing the sensor, check the operation of the fan. When it stops (for example, due to ice), the temperature in the chamber rises, and the control unit may erroneously signal a sensor malfunction.

How to check a temperature sensor with a multimeter: step-by-step test

Before replacing the sensor, be sure to make sure that it is really faulty. For this you will need multimeter (even a budget model for 300–500 rubles will do) and a thermometer (for example, a kitchen one). Follow the algorithm:

1. Disconnect the refrigerator from the mains and let it stand for 10-15 minutes - this will release the residual charge in the capacitors.
2. Remove the protective casing (in models with a display on the door) or the back panel in fridge compartment (depending on the location of the sensor).
3. Disconnect the sensor connector from the control board. Usually it is connected through 2-3 contacts with a latch.
4. Ring the sensor:
   • 🔧 Switch the multimeter to resistance measurement mode (20 kOhm).
   • 🔌 Connect the probes to the contacts sensor (polarity is not important).
   • 🌡️ Measure the resistance at room temperature (~20°C) - it should be in the range 4–7 kOhm.
   • 🧊 Place the sensor in a glass of cold water (+5°C) - the resistance should increase to 10–15 kOhm.
   • ☕ Hold the sensor over a cup of hot water (40–50°C) - the resistance will drop to 1–3 kOhm.

If the resistance:

• 🚫 Does not change when the temperature changes → sensor faulty (open circuit).
• ∞ Shows infinity → internal break.
• 0 Shows zero → short circuit.
• ✅ Changes smoothly within the specified limits → the sensor is working, the problem is elsewhere (for example, in the connector contacts).

If the sensor is working, but the refrigerator is not working properly, clean the connector contacts alcohol or eraser - oxidation can distort the signal. Also check the integrity of the wires leading to the sensor: they often rub against the body.

Choosing a new sensor: original vs analogues, where to buy and how much it costs

If diagnostics have confirmed a malfunction, it’s time to choose a replacement. Temperature sensors for Stinol are divided into two types:

1. Original — produced under the brand Stinol (or Indesit, since after 2001 refrigerators were produced on their platform). Articles begin with C00 or ST, for example:
   • C00356701 - refrigerator compartment sensor for models STN 165/185.
   • ST-18-1 - freezer sensor for No Frost.
2. Universal analogues —suitable in terms of resistance and dimensions. Popular brands: Danfoss, Sensata, Thermik. The main thing is a match in:
   • 📏 Cable length (from 50 to 150 cm).
   • 🔌 Type connector (2 or 3 contacts).
   • 🌡️ Resistance range (see table above).

Where to buy:

• 🛒 Official service Stinol/Indesit centers - original parts, but the price is 30–50% higher.
• 🌍 Online stores (for example, 220-volt.ru, Holodilnik.ru, AliExpress) - cheaper, but check the reviews.
• 🔧 Shops spare parts for household appliances - often have universal sensors in stock.

Tip: if you are not sure about the choice, take a photo of the old sensor (especially the connector and markings) and show it to the seller. In 90% of cases, a compatible replacement will be selected. Pay attention to wire length —if it is too short, you will have to increase it, which is undesirable.

⚠️ Attention: In refrigerators Stinol releases before 2005 could use sensors with non-standard connectors. If you don’t find the original, you will have to solder a new connector or buy a sensor with a wire and cut it to the required length.

Preparation for replacement: tools and safety measures

Replacing the temperature sensor in Stinol does not require professional equipment, but will require accuracy. Prepare:

Phillips screwdriver (PH2)

Flat screwdriver or plastic pick for removing panels

Mulmeter (for re-checking)

Soldering iron (if you need to build up wires)

Heat shrink tube or electrical tape

Alcohol and cotton swabs for cleaning contacts

Hair dryer (for defrosting No Frost, if necessary)

Gloves (protection from sharp edges metal)-->

Also useful:

• 📸 Phone camera - take a photo of the location of the sensor and wires before dismantling.
• 🧲 Magnet - so as not to lose screws in hard-to-reach places.
• 🧊 Warm water and rags —for removing condensation after defrosting.

Safety measures:

1. Unplug the refrigerator and pull the plug - it’s not enough to just turn it off with the button!
2. If the model is with No Frost, give it completely defrost (8-12 hours) - ice can damage the evaporator when dismantling the panels.
3. Do not use sharp objects to remove plastic panels - they are fixed with latches that are easy to break.
4. If the sensor is located next to capillary tube (thin copper tube), do not bend it - this may lead to freon leakage.

In models Stinol STN 165/185 the refrigerator compartment sensor is usually hidden behind a plastic panel on the back wall (you will have to remove the shelves). In the No Frost freezer, it is attached to evaporator - here it is more difficult, since you need to remove the fan and protective casing.

How to remove the back panel in the refrigerator compartment without damage?

1. Remove all shelves and drawers.

2. Find plastic plugs in the upper corners of the panel - pry them off with a flat screwdriver.

3. There are screws hidden under the plugs - unscrew them.

4. Gently pull the panel towards you, starting from the bottom edge (the latches are there).

5. If the panel does not budge, check whether there are hidden clips on the sides.

Step-by-step instructions: how to remove the old sensor and install a new one

The replacement process depends on the model Stinol and the location of the sensor. We will consider two options: for refrigerator compartment (simpler) and for No Frost freezer (more difficult).

Option 1: Refrigerator compartment sensor (drip system)

1. Remove the shelves and back panel:
   • Remove all removable elements (shelves, drawers, egg door).
   • Unscrew the screws holding the back panel (usually 4-6 pieces).
   • Carefully remove panel by pulling it towards you (bottom edge first).
2. Find the sensor:
   • It looks like a small a cylinder with a wireattached to the evaporator tube or back wall.
   • In some models, the sensor is built into plastic holder —it needs to be snapped out.
3. Disconnect the connector:
   • Gently press the connector latch and pull it out it.
   • If the contacts are oxidized, clean them with alcohol.
4. Remove the old sensor:
   • If it is fixed clip, pry it off with a screwdriver.
   • If glued, carefully cut the glue with a knife (do not damage the tubes!).
5. Install a new sensor:
   • Secure it in the same place (use a clip or hot glue).
   • Connect the connector - it should snap into place with a slight click.

Assemble the refrigerator in the reverse order.

Option 2: Freezer sensor (No Frost)

Here the process is more complicated due to the need to dismantle the fan and evaporator:

1. Defrost the freezer (if there is ice).
2. Remove the back panel of the freezer:
   • Unscrew the screws around the perimeter.
   • Disconnect the fan connector (usually it is on a latch).
   • Carefully remove the panel - the evaporator with the sensor is hidden under it.
3. Remove the fan (if it interferes):
   • Unscrew 2-3 screws holding its body.
   • Disconnect the power connector.
4. Take out the sensor:
   • It can be inserted into a plastic holder on the evaporator or glued to it.
   • Carefully remove it without damaging the evaporator tubes.

Install a new sensor and assemble everything in the reverse order.

After replacement:

• 🔌 Connect the refrigerator to the network.
• 🕒 Let it work for 2-3 hours, then check the temperature in the chambers.
• 📊 If there is a display, reset the errors (if they were on) - to do this, turn off the refrigerator for 10 minutes.

Typical errors when replacing and how to avoid them

Even with careful work you can make mistakes that will lead to damage. Here are the most common:

• 🔧 Damage to the capillary tube when dismantling the panel → freon leak. How to avoid: do not use force if the panel cannot be removed - look for hidden screws or latches.
• 🔌 Incorrect connector connection → errors on the display or compressor failure. How to avoid: take a photo of the location of the contacts before disconnecting.
• 🌡️ Installing the sensor in the wrong place → incorrect temperature readings. How to avoid: the new sensor must touch the same surface as the old one (for example, the evaporator tube).
• 🧊 Incomplete defrosting No Frost → ice will damage the evaporator during assembly. How to avoid: let the refrigerator defrost for at least 8 hours.
• 🔥 Overheating with a soldering iron when extending wires → insulation melting. How to avoid: use a soldering iron with a power of no more than 40 W and a heat-shrinkable tube.

Another common problem is moisture on the contacts after defrosting. To avoid this:

1. Before assembly, wipe all connectors and wires with a dry cloth.
2. Let the refrigerator stand with the door open for 10-15 minutes to ventilation.
3. For the first 2-3 hours after switching on, do not load the chambers with food - let the system stabilize.

⚠️ Attention: If after replacing the sensor the refrigerator Stinol still does not cool, check compressor relay i start-up relay. Their malfunction can manifest itself with the same symptoms as a sensor failure.

What to do if after replacing the sensor the refrigerator does not work correctly

You installed a new sensor, but the problem remains? Do not rush to blame the part - other reasons are possible:

If you are sure that the sensor is installed correctly, but the refrigerator Stinol is behaving strangely, perform diagnosis of the electronic unit:

1. Disconnect the refrigerator from the power supply.
2. Remove the top cover (the control unit is usually located there).
3. Inspect the board for darkened elements (sign of burnout), swollen capacitors or oxidized tracks.
4. If you have a soldering iron and skills, check output voltage unit (should be 5V or 12V depending on the model).

If the control unit is faulty, you can:

• 🔧 Repair (replacing capacitors, soldering contacts) - will cost 1000–2000 rubles.
• 🆕 Replace with a new one - price 3000–6000 rubles (depending on the model).

In some cases it helps reset the block settings to factory settings. To do this:

1. Unplug the refrigerator for 10 minutes.
2. Turn it back on.
3. For 5 seconds, press and hold the "Super Freeze" (or "Fast Cool" button, depending on the model).
4. Hold until a beep sounds (about 10 seconds).

FAQ: Frequently asked questions about replacing the sensor in a Stinol refrigerator

Is it possible to replace the temperature sensor without defrosting the refrigerator?

In models with drip system (without No Frost) you can do without complete defrosting, but it is still recommended to remove the ice in the freezer so as not to damage the evaporator. In refrigerators No Frost defrosting is mandatory - otherwise it will not be possible to remove the back panel of the freezer.

Which sensor should I buy if I don’t know the model of the refrigerator?

If there is no plate with the model on the refrigerator (usually it is on the side wall or inside the camera), do the following:

1. Take a photo of the old sensor on both sides (especially the connector).
2. Measure its resistance at room temperature.
3. Contact a spare parts store - they will select an analogue based on the photo and resistance.

As a last resort buy a universal sensor with adjustable resistance (for example, Danfoss 025B6000).

What will happen if you install a sensor with a different resistance?

If the resistance of the sensor does not correspond to the standard one, the electronic unit will receive incorrect data about the temperature. This will lead to:

• Insufficient cooling (if the resistance is too low).
• Freezing of the chambers (if the resistance is too high).
• Constant operation of the compressor and increased energy consumption.

In some cases, the control unit may turn off the compressor, considering that the temperature has already reached normal.

How long does it take to replace the sensor?

The time depends on the model and your experience:

• 🕒 Refrigerator compartment (drip system): 30–60 minutes.
• ❄️ Freezer No Frost: 1.5–3 hours (due to defrosting and removing the fan).

If If you are doing repairs for the first time, allow extra time for photographing the processes and careful dismantling.

Is it possible to repair an old sensor?

Temperature sensors (thermistors) cannot be repaired —they can only be replaced, however, in 30% of cases the problem lies not in the sensor itself, but rather. c:

• 🔌 Oxidized connector contacts —they can be cleaned with alcohol or an eraser.
• 🔗 Damaged wires —if the insulation is frayed, the wire can be extended and insulated.
• 📉 Bad contact on the control board —check the soldering of the sensor contacts on the unit.

Before buying a new sensor, be sure to check these points!