Samsung combi dryer/washer motor ( EC2) code.
Hello!
I have a combi washer WD90N643OAW from Samsung thats giving me a headache!
Started with the first time the issue came, i bought a new PCB board and boom it started spinning again.. That lasted for about 3 weeks, then a motor error code came, bought a motor, swapped it but no dice. Still won´t start spinning.
entered service mode and checked, EC2 code came in really quick.
Took out both boards, Main bord flashing , but pcb board flashes green faster, so i guess something is wrong somewhere. But weird if the new board got killed within 3 weeks of running normal.
I have taken out both boards, even swapped PCB back to the old one just to check.
any ideas?
EDIT:
I just cross connected both ( actually all three) motors, they are all confirmed as working. So has to be a rele or the board it self.
AAEE896C-8B6A-47D8-AF41-6D197F0870AF.mov
Solution Summary
AI-generated from this discussion
This thread was marked as solved. Here's a summary of the problem and the fix, generated from the discussion below.
Samsung WD90N643OAW shows EC2 motor error and will not spin
- The problem
- Samsung washer-dryer WD90N643OAW stopped spinning and reports EC2 in service mode. The owner had already replaced a PCB/control board, which briefly restored spinning for about three weeks, and then replaced the motor, but the appliance still would not start spinning.
- Likely cause
- The discussion supports a fault outside the motor itself. After cross-checking all three motors and confirming they work, the most likely cause is in the motor drive/control circuit, wiring loom, connectors, or motor feedback circuit to the board. A failed relay or board fault was also suggested by the owner, but not confirmed.
- What fixed it
- Recommended action was to isolate the appliance from the mains and inspect the motor wiring loom, motor and board connectors, and the motor feedback circuit, and to examine the drive board/inverter area for damaged tracks, solder joints or failed components. If those checks do not identify the fault, further diagnosis of the motor control board/inverter stage or main PCB was advised. No completed repair was confirmed in the thread.
- Checks to try
- EC2 fault code appeared quickly in service mode
- Replacement PCB initially restored spinning for about 3 weeks
- Replacement motor did not restore spinning
- Original, replacement and a third motor were cross-connected and confirmed working
- Suggested checks of motor wiring loom, connectors, feedback circuit, and drive board/inverter area
- Suggested check that the drum turns freely by hand
- Parts or tools mentioned
- PCB/control board
- motor
Safety: Isolate the appliance from the mains before internal inspection. Further diagnosis should be carried out by a suitably qualified appliance engineer.
1 Answer
Hello,
If you’ve now proved the original and replacement motors will all run, the fault is much more likely to be in the motor drive circuit, wiring, or feedback side rather than the motor itself. I wouldn’t rely too much on LED flash rates alone unless you have Samsung service data for that exact model.
Before checking anything internal, isolate the appliance from the mains.
1. Check the motor wiring loom carefully Follow the loom from motor to the inverter/control board and main PCB. Look for broken wires, overheated plugs, loose pins, or corrosion. On washer dryers, vibration can fracture conductors near the motor plug or where the loom is tied to the tub.
2. Inspect the motor connector and board plugs Even if they look connected, remove and refit each plug. A poor connection on the motor windings or tacho/Hall feedback can bring up a motor fault very quickly.
3. Check the feedback circuit These machines need to “see” motor speed/position feedback almost immediately. If the Hall sensor/tacho wiring is open circuit, shorted, or not reaching the board, the machine can flag a motor error even with a good motor fitted.
4. Examine the drive board/inverter area Look for burnt tracks, damaged solder joints, failed relays (if fitted), or blown power components. If a replacement board failed again after 3 weeks, something external may be stressing it.
5. Check for drum drag or wiring damage under load Make sure the drum turns freely by hand and nothing is mechanically jamming the drive system.
If wiring and feedback test good, I’d strongly suspect the motor control board/inverter stage or the main PCB not commanding it correctly. For live electrical testing or board-level diagnosis, best to use a qualified appliance engineer.
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This answer was generated automatically by the WhitegoodsHelp AI Assistant. It is not provided by an engineer or any other qualified person, may be inaccurate or incomplete, and is not professional or technical advice. Do not rely on it. Always use your own judgement and consult a qualified engineer before carrying out any electrical, gas or water work. Use is entirely at your own risk. See our full Terms of Use.
SAFETY FIRST: READ BEFORE ACTING ON THIS GUIDANCE
Never work on a live appliance
Always unplug it at the mains before going near it with any tools.
Never attempt gas work
By law, gas appliances must only be worked on by a Gas Safe registered engineer. If your fault involves gas, stop and call a professional. Do not attempt it yourself.
Watch for sharp edges
Outer panels are smooth, but internal parts have sharp machined edges. Wear protective gloves and arm sleeves.
Water appliances can leak
Turn off the water supply before disconnecting any hoses.
Know your limits
If you are not confident testing or working inside the appliance, stop and call a professional.
AI guidance, not guaranteed
This response is generated automatically by the WhitegoodsHelp AI Assistant. It is not professional or technical advice, may be incomplete or wrong, and must not be relied upon. Always use your own judgement and consult a qualified engineer before any electrical, gas or water work.
This is general information only and is not professional advice. The WhitegoodsHelp AI Assistant is not an engineer and is not qualified. See our full Terms of Use.
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