Appliance Spares
Quick answer: If your Samsung fridge section has gone warm while the freezer stays rock hard, the parts that fail most, in order, are the defrost sensor, the defrost heater, the evaporator fan motor and (on bottom-mount and French-door models) the damper motor. All are stocked in Australia and dispatched from Sydney the day you order (12pm Sydney cut-off). Matching the full model number on the sticker inside the fridge, /SA suffix included, is what gets you the right one.
Last updated September 2026
Samsung fridges fail in a recognisable order
There’s a sheet of ice on the back wall of the fridge section. The freezer is still rock hard. The milk went off two days early. It’s the classic Samsung complaint, and it comes down to a short list of parts.
Every Samsung cabinet has an evaporator coil behind the back panel, a fan pushing cold air around, and a heater that melts the frost off the coil a few times a day. When that breaks, things fail in the same order: defrost sensor, defrost heater, evaporator fan, then the damper motor on bottom-mounts and French doors, then the temperature sensors.
The table maps symptom to part. Everything in it is stocked in Australia and dispatched from Sydney the day you order (12pm Sydney cut-off).
| What you’re seeing | What it usually is | The part |
|---|---|---|
 Sheet of ice on the back wall, fridge warm, freezer fine, on an RS552 or RS554 side-by-side | Defrost heater (one of two on a twin-cooling cabinet) | Samsung Fridge Defrost Heater RS552NRUASLSA RS554NRUASLSA |
 Same ice build-up on an RS51K side-by-side | Defrost heater | Samsung Fridge Defrost Heater RS51K5460SL/SA, RS51K54F02C/SA |
 Frost creeping back over weeks, heater tests fine, fridge swings between fine and warm | Defrost sensor | 3 x Samsung Fridge Freezer Defrost & Temperature Sensor |
 Fridge warm, freezer fine, no ice anywhere, on an RL40 bottom-mount | Damper motor stuck shut | Samsung Fridge Damper Motor RL40A4SBASL/SA, RL40B4SBAB1/SA, RL40B4SBASL/SA |
 Fan hum gone quiet or turned into a grind, freezer creeping up, on an SR341 or SRF886 | Evaporator fan motor | Samsung Fridge Motor Fan Assy – Suits SR341MLS SRF886SCLS |
 Display reads a temperature the fridge isn’t holding, compressor never rests, sensor code showing | Fridge temperature sensor | Samsung Fridge Temperature Sensor |
 Older RT top-mount running flat out or not at all, the dial does nothing | Mechanical thermostat | Samsung Fridge Thermostat RT45MBIS1/XSA, RT45MBMT2/XSA, RT41MBSW2/XSA |
Defrost sensor and defrost heater: the ice-on-the-back-wall fault
Two parts run the defrost cycle: the defrost sensor, a small thermistor clipped to the coil that tells the board when to start and stop, and the sheathed heater under it. When either dies, the frost stays and becomes a sheet of ice that chokes the airflow. The freezer, sitting on the coil, stays cold. The fridge, fed by air pushed up from the coil, drifts warm. The fridge doesn’t know it’s spring, and the ice behind the back wall certainly doesn’t.
Unplug at the wall, pull the back panel and test. The heater should show continuity on a multimeter; open circuit means it’s finished. The sensor’s resistance should move as you warm it in your hand; a fixed reading means it’s finished. If the heater passes, it’s the sensor, which is the cheaper part anyway. The 3 x Samsung Fridge Freezer Defrost & Temperature Sensor pack is the common clip-on type; the Samsung Fridge Freezer Sensor is the freezer-side sensor on other cabinets.
Twin-cooling side-by-sides (the RS family) have an evaporator and heater behind each compartment, so the RS552 and RS554 carry two heater listings: the one in the table and the Samsung Fridge Defrost Heater RS552NRUASL/SA, RS552NRUAWW/SA, RS554NRUASL/SA. Note which side is icing up and compare the photos to the heater you pull out. Other cabinets take a different Samsung Fridge Defrost Heater; search your model number to see which.
Full walk-through, including the drain that refreezes after a defrost fault: Samsung fridge not cooling: step-by-step diagnosis and fridge not cooling but freezer works.
Evaporator fan and damper motor: warm fridge, no ice
No ice sheet? Then it’s airflow, not defrost.
Evaporator fan motor. The fan in front of the coil pushes cold air around the cabinet. It usually announces itself: a hum that becomes a grind, then silence. The freezer creeps up and the fridge follows. On the SR341 and SRF886 the Samsung Fridge Motor Fan Assy – Suits SR341MLS SRF886SCLS is the drop-in. If noise is the main complaint, pin the source with the Samsung fridge loud noise guide first.
Damper motor. On RL and RB bottom-mounts and RF French doors, cold is made in the freezer and metered up through a motorised flap at the top back of the fridge compartment. Stuck shut, the fridge warms, the freezer is perfect and there’s no ice. Stuck open, the crisper freezes the lettuce. Listen for the flap clicking at power-up; silence points at the motor. For the RL40 bottom-mounts, the Samsung Fridge Damper Motor RL40A4SBASL/SA, RL40B4SBAB1/SA, RL40B4SBASL/SA is the part.
Temperature sensors and thermostats
Electronic Samsung cabinets read thermistors in the fridge, the freezer and on the coil. If one drifts, the board believes it: the fridge over-cools, the compressor runs a marathon, or you get an error code. The fridge-cabinet Samsung Fridge Temperature Sensor and the freezer sensor above are cheap and quick, and they’re the first check before anyone talks about a control board, which gets fitted after diagnosis, not on a guess. If there’s a code on the display, decode it in the Samsung fridge error codes guide first.
Older RT top-mounts and the SR range use a mechanical thermostat behind the dial. When it fails the fridge runs flat out or not at all. The RT part is in the table; the SR cabinets take the Samsung Fridge Thermostat SR281MW SR368NTS SR367NW SR393NTS SR395NTS.
What we don’t stock, and what’s licensed-only
- Door seals. We don’t stock Samsung fridge door seals. Send the model number through the contact page and we’ll give you an honest yes or no.
- Sealed system. Compressor, refrigerant and coil leaks: licensed only. Compressor running, warm everywhere, no frost on the coil at all: that’s a sealed-system symptom and a call to a repairer.
- Control boards. Fitted after diagnosis. A board replaced on a hunch usually turns out to have been a sensor.
- Water and ice parts. Valves, filters and dispenser parts: our range is thin. Send the model number and we’ll check.
Across every brand: the fridge spare parts pillar.
Where the model sticker is on a Samsung fridge, and how to match it
It’s on the left-hand wall inside the fridge compartment, usually at the top or just above the crisper drawers; on a few older top-mounts it’s inside the door. Photograph it; the 30-second Samsung model number guide shows what it looks like.
The prefix is the family: RS side-by-side, RL and RB bottom-mount, RF French door, RT top-mount, SR and SRF the older Australian-market cabinets. The /SA at the end (/XSA on older stock) means sold new in Australia, and two fridges that differ only in that suffix can take different parts, so type the whole thing in, slash included.
Search the full model number on the site and every part we hold for it comes up, or browse the Samsung models pages, the Samsung parts category or the wider fridge and freezer parts range. Not sure which listing is yours? Send the model number via the contact page and we’ll check before you order.
DIY or repairer?
Sensors sit in the $15–30 band. Damper motors, fan motors and thermostats are around $35–55. Defrost heaters run $70–90. A repairer’s call-out and diagnosis is typically $100–165 before parts, and on a defrost fault they’ll fit exactly the parts above.
The work is screwdriver-and-multimeter territory: unplug, empty the shelves, unclip the back panel, thaw the ice with a hair dryer and patience, test, swap, refit. Allow an hour plus thaw time. Call a repairer when the compressor runs and nothing gets cold (sealed system), when the fault survives a new sensor and heater (board territory, and it needs proper diagnosis), or when it’s on the water side of a plumbed French door. Know the right part, then decide who fits it.
Frequently asked questions
Q: Why is my Samsung fridge warm but the freezer still works?
A: Almost always the defrost cycle. A failed defrost sensor or heater lets ice build on the coil, and the fridge is the first to warm. No ice? Check the evaporator fan and, on bottom-mounts and French doors, the damper motor.
Q: How do I tell whether it’s the defrost sensor or the defrost heater?
A: Unplug, pull the back panel and test with a multimeter. The heater should show continuity; the sensor’s resistance should change as it warms in your hand. If the heater passes, replace the sensor; it’s cheaper and fails more often.
Q: Do you stock Samsung fridge door seals?
A: No, door seals are not a line we hold. Send your model number through the contact page and we’ll tell you straight whether we can get one.
Q: What does the /SA on my Samsung model number mean?
A: It’s the Australian-market suffix (older cabinets use /XSA). Fridges sold elsewhere under a similar number can take different parts, so always match the full number, suffix included.
Q: My Samsung fridge is showing an error code. Which part do I need?
A: Sensor codes point to a thermistor, fan codes to the evaporator or condenser fan, defrost codes to the heater or sensor. Decode it in our Samsung fridge error codes guide before you buy, and never replace the control board on a code alone.
Read the model number off the sticker inside the fridge and search it on the site. Not sure? Send it through the contact page and we’ll match it before you order. Everything above is dispatched from Sydney’s Northern Beaches the day you order when it’s in by 12pm Sydney time.
Disclaimer: this article is general information only and is provided without warranty of any kind. Appliance designs vary between models and production runs — always follow the manufacturer’s instructions, switch off and unplug the appliance before starting any work, and confirm parts against the model number on your appliance’s model sticker. Any repair is undertaken at your own risk and Oz Appliance Spares accepts no liability for injury, loss or damage arising from work performed after reading this guide, to the maximum extent permitted by law. If in doubt, use a qualified technician.
