If your refrigerator Samsung suddenly stopped freezing, constantly works without stopping, or, conversely, turns off too often - the problem may lie in a small but critical detail: reed switch. This miniature magnetic switch is responsible for the correct operation of the defrosting system No Frost, and its malfunction leads to cooling failures, icing of the evaporator and even breakdown of the compressor.
In this article we will figure out what it is reed switch (or reed sensor), where it is located in refrigerators Samsung of different series (RB, RT, RS), how to check its functionality with a multimeter and replace it yourself. You will also learn why reed switches fail more often in models with the system Twin Cooling Plus, and how to extend their service life.
Spoiler: in 80% of cases, replacing a reed switch is cheaper than repairing a compressor or electronic unit, but requires care. If you have never disassembled a refrigerator, it is better to entrust the work to a specialist. However, for experienced users, we have prepared step-by-step instructions with photos and connection diagrams relevant for models Samsung 2018–2026.
What is a reed switch and why is it needed in a Samsung refrigerator
Reed switch (from the words “sealed contact”) - this is electromechanical relay activated by a magnetic field. In refrigerators Samsung it plays a role evaporator door position sensor in systems No Frost i Frost Free. Its main task is to signal to the electronic unit that the freezer door is closed and the defrosting cycle can be started.
Structurally, the reed switch consists of:
- 🧲 Two ferromagnetic contacts sealed in a glass flask with an inert gas (to protect against oxidation).
- 🔧 A spring mechanism that opens the contacts in the absence of a magnetic field.
- 🧲 A permanent magnet mounted on the evaporator door (in some models the magnet is built into the reed switch).
When the door closes, the magnet approaches the reed switch, the contacts close, and the control unit receives a signal that it is ready for defrosting. If the reed switch is faulty, the electronic module “does not see” the closed door and either constantly turns on the heater (which leads to overheating) or does not start defrosting at all (which leads to icing of the evaporator).
Where the reed switch is located in Samsung refrigerators of different series
The location of the reed switch depends on the model and type of defrosting system. In most refrigerators Samsung s No Frost (series RB, RS, RT) it is installed on freezer evaporator frame, next to the heating element (heating element). In two-compressor models with Twin Cooling Plus (for example, Samsung RB37J5230SA) there can be two reed switches - one for each evaporator.
Exact locations:
| Refrigerator series | Type of defrost | Location of reed switch | Number of reed switches |
|---|---|---|---|
| RB (for example, RB30J3000WW) | No Frost (Full) |
On the plastic frame of the evaporator freezer compartment, to the right or left of the heating element | 1 |
| RS (for example, RS62R5001M9) | No Frost + freshness zone |
On the back wall of the freezer, under the evaporator cover | 1–2 (depending on modification) |
| RT (for example, RT43K6030S8) | Frost Free (combined) |
In the upper part of the freezer compartment, next to the fan | 1 |
| RF (for example, RF23J9011SG) | Twin Cooling Plus |
One reed switch for each evaporator (freezer + fridge compartment) | 2 |
To get to the reed switch, you will need to remove the back panel of the freezer (in models with No Frost) or the top cover of the evaporator (in Frost FreeIn some refrigerators Samsung 2020–2026 the reed switch is hidden under). a decorative cover with latches - it can be removed by prying it with a flat screwdriver.
Signs of a faulty reed switch: when is it time to check
The reed switch is a consumable item, and its service life is about 5–7 years (or 50–100 thousand operation cycles). The following symptoms indicate a malfunction:
- ❄️ Icing evaporator —a thick layer of ice forms on the back wall of the freezer, despite operation
No Frost. - 🔥 Constant operation of the heater —the back wall of the refrigerator is hot, the noise of the fan is heard, but the cooling is weak.
- ⚡ Frequent compressor on/off —the motor runs jerkily, with pauses of 1-2 minutes.
- 🚨 Errors on the display - codes
22E,25Eor33E(in models with electronic control). - 🕳️ Lack of cold air in the refrigerator compartment (if the fan).
It is important to distinguish a reed switch failure from other faults. For example, icing of the evaporator can also cause:
- 🔌 Faulty Defrost heating element (checked with a multimeter on break).
- 🌀 Clogged drainage hole (water does not drain, freezes at the bottom of the chamber).
- 💨 Fan breakdown (a hum is heard, but air does not circulate).
How to distinguish a faulty one reed switch from a burnt heating element?
If the heating element is burned out, the defrosting heater does not turn on at all, and ice builds up evenly. If the reed switch breaks, the heating element can work constantly (overheating) or chaotically (ice forms in spots).
The most reliable diagnostic method is checking the reed switch with a multimeter. We will talk about this in detail in the next section.
How to check the reed switch in a Samsung refrigerator with a multimeter
To check the reed switch you will need:
- 🔧 Multimeter (in continuity mode or measuring resistance).
- 🧲 A small magnet (can be taken from the refrigerator or from the speaker).
- 🔌 Screwdriver (for removing the panel).
Step-by-step instructions:
- Unplug the refrigerator and remove the back panel of the freezer.
- Find the reed switch - it looks like a small glass tube with two terminals, mounted on a plastic holder.
- Disconnect the power connector from the reed switch (carefully, do not damage the wires!).
- Switch the multimeter to the continuity mode (or to the 200 Ohm limit).
- Touch probes to the reed switch contacts:
- 🔴 Without a magnet —the resistance should be
∞(open). - 🟢 With a magnet (bring it to the reed switch)—the resistance should drop to
0–1 Ohm(closed).
- 🔴 Without a magnet —the resistance should be
☑️ Checking the reed switch multimeter
If the reed switch is working, but the symptoms of failure persist, check:
- 🔌 The integrity of the wires from the reed switch to the electronic unit (often chafed or oxidized).
- 🧲 Magnet on the door - it could have shifted or lost power (checked with the same magnet from dynamics).
- 📱 Electronic module —if it does not respond to the reed switch signal, diagnostics of the board will be required.
How to replace the reed switch in a Samsung refrigerator yourself
If diagnostics have confirmed that the reed switch is faulty, it can be replaced without calling a technician. The cost of a new part is from 300 to 800 rubles (depending on the model). It is important to choose analogue with the same dimensions and resistance. For refrigerators Samsung reed switches are most often suitable:
DA-97-08011A(for models RB, RS 2018–2022).DA-97-10537A(for RT and RF sTwin Cooling).DA-97-12593B(universal, for new series).
Tools for replacement:
- 🔧 Phillips screwdriver and flat.
- 🔌 Soldering iron (if the wires are soldered and not on the connector).
- 🧲 Magnet (for testing after installation).
- 📏 Plastic ties (for fixing the wires).
Step-by-step replacement:
- Unplug the refrigerator and defrost it.
- Remove the back panel of the freezer (in models with
No Frostit is secured with 4-6 screws). - Disconnect reed switch power connector or cut the wires (if they are soldered).
- Carefully remove the old reed switch from the holder (it can be snapped or glued).
- Install the new reed switch, fixing it in the same position.
- Connect the wires (if when soldering, use a heat-shrink tube for insulation!).
- Check the reed switch operation with a magnet (it should click).
- Assemble the refrigerator in the reverse order.
After replacement, turn on the refrigerator and observe its operation:
- ✅ The evaporator should defrost every 8-12 hours (the sound of the heating element is heard).
- ✅ Cold air should be blowing in the refrigerator compartment (check with your hand).
- ✅ The compressor should operate in cycles (20–30 minutes of operation, 10–15 minutes of rest).
Common mistakes when replacing a reed switch and how to avoid them
Even experienced craftsmen sometimes make mistakes that lead to repeated breakdowns. Here's what cannot be done when replacing a reed switch:
⚠️ Attention! If the reed switch in your model Samsung is soldered into the control board (and not connected through a connector), do not try to replace it yourself. Soldering SMD components requires special equipment, and the risk of damaging the board is too high.
- 🔌 Use a reed switch from another model - even if it looks similar, the contact resistance may differ, and the electronic unit will not recognize the signal.
- 🧲 Install the reed switch in an inverted position —this will change the magnet response zone, and the door will not lock correctly.
- 🔥 Soldering without insulation —bare wires can short-circuit to the housing, which will lead to fuse burning.
- 🛠️ Force bend the contacts —the glass bulb of the reed switch is fragile, and when deformed it will crack, which will make the part inoperative.
Also pay attention to:
- 🔍 Condition of the magnet on the door —if it weakened or displaced, the new reed switch will operate unstable.
- 🔌 Integrity of the connector — oxidized or burnt contacts can distort the signal.
- 📏 Securing the wires —they should not touch the blades fan or heating element.
If after replacing the reed switch the refrigerator still does not work correctly, the problem may be in:
- 🔌 Electronic control unit (board diagnostics required).
- 🌀 Temperature sensor (for example,
DA-97-08014A). - 🔥 Defrost heating element (check its resistance with a multimeter).
How to extend the life of the reed switch in a Samsung refrigerator
The reed switch is a mechanical part, and its wear is inevitable. However, you can slow down the process if:
- 🧲 Do not slam the freezer door - sharp impacts displace the magnet and deform the contacts of the reed switch.
- 🔧 Regularly defrost the refrigerator (even c
No Frost) - this reduces the load on the defrosting system. - 🧹 Clean the ventilation holes - clogs cause the compressor to work harder, which increases the number of defrosting cycles.
- 🌡️ Do not overload the freezer — tight fit of food to the back wall interferes with air circulation.
Also pay attention to power supply quality. Frequent power surges can damage not only the reed switch, but also the electronic unit. If your network has unstable voltage, use it. stabilizer or voltage control relay.
Average service life of a reed switch in refrigerators Samsung:
| Operating conditions | Service life of a reed switch |
|---|---|
| Ideal (soft closing of the door, stable voltage, regular cleaning) | 7–10 years |
| Medium (periodic door slams, rare defrosts) | 5–7 years |
| Aggressive (frequent power surges, chamber overload, rare maintenance) | 3–5 years |
If your refrigerator Samsung is older than 7 years, it makes sense to buy a spare reed switch in advance and keep it on hand. This will save time and money in case of a sudden breakdown.
FAQ: Frequently asked questions about reed switches in Samsung refrigerators
🔍 Is it possible to repair the reed switch or just replace it?
The reed switch is a non-repairable part. Its glass bulb is sealed, and if you try to disassemble its contacts, the contacts will oxidize or break. new.
🛒 Where to buy a reed switch for a Samsung refrigerator?
Original reed switches can be ordered:
- At official service centers Samsung (by part code, for example,
DA-97-08011A). - At sites like AliExpress or eBay (search by refrigerator model).
- In stores of spare parts for household appliances (for example, 220-volt.ru, All-Zapchasti).
Cost - from 300 to 1500 rubles depending on the model.
⚡ Can a faulty reed switch damage the compressor?
Yes, but indirectly. If the reed switch does not work, the electronic unit can:
- Do not turn on defrosting → ice will block the fan → the compressor will overheat.
- Keep the heating element on all the time → the temperature in the chamber will rise → the compressor will work without stopping.
In both cases, the risk of compressor failure increases 2-3 times.
🔧 Is it necessary to reset the refrigerator settings after replacing the reed switch?
In most models Samsung with electronic control (RB, RS, RF), after replacing the reed switch, errors must be reset. To do this:
- Disconnect the refrigerator from the network for 1 minute.
- Turn it back on and press the buttons simultaneously
Freezer+Fridge(in some models -Power Cool+Power Freeze) for 5 seconds. - Wait for a sound signal or display flashing.
If the error remains, perhaps the problem is not only in the reed switch.
🛠️ Is it possible to temporarily do without a reed switch?
Technically, yes, but this is fraught with consequences. Some craftsmen close the reed switch contacts “directly” (with a jumper), simulating a closed door. However, this leads to:
- Continuous operation of the heating element → risk of fire.
- Icing of the evaporator → fan failure.
- Overheating of the compressor.
Such “repairs” are only permissible for 1-2 days until a new reed switch is purchased.