What Does Error Code E51 Mean on an Electrolux Washing Machine?
Power off the machine at the wall, leave it unplugged for 10 minutes to allow the control board to fully reset, then restart a short cycle to see if the error clears (takes about 10 minutes).
Fault description
Error code E51 points to a short circuit in the motor triac — the electronic switch on the control board responsible for regulating the flow of electrical power to the drum motor. When this component fails or is disrupted, the machine's electronics detect an abnormal current condition and shut down to prevent further damage.
When E51 appears, the washing machine will typically stop mid-cycle or refuse to start a new one. The drum will not spin, and the error code will remain displayed until the underlying fault is resolved. In some cases the machine may attempt to restart and immediately throw the code again.
This is primarily an electronic fault rather than a mechanical one, though a seized or heavily overloaded motor can sometimes trigger the same code by placing excessive stress on the triac itself.
Causes
- Faulty or damaged motor triac on the control board — The triac is a semiconductor component soldered onto the main PCB. It can fail due to age, power surges, or overheating, causing a permanent short circuit that triggers E51 every time the machine is powered on.
- Damaged or shorted motor wiring harness — The wiring loom running between the control board and the motor can develop chafed insulation or loose connectors over time. A short in this wiring mimics a triac fault and will produce the same E51 code.
- Faulty or seized drum motor — If the motor itself has developed an internal short or its bearings have seized, it draws far more current than normal. This excess load can blow the triac or cause the board to register a short-circuit condition.
- Overloaded drum causing motor stress — Consistently overloading the machine forces the motor to work beyond its rated capacity. Over time this thermal and electrical stress can degrade the triac and eventually cause it to fail.
- Power surge or voltage spike — A sudden spike in the mains supply can instantly damage sensitive semiconductor components like the motor triac. If E51 appeared immediately after a power outage or storm, a surge is a likely cause.
Step-by-Step Fix
- 1
Perform a hard reset
Switch the machine off at the wall socket and unplug it completely. Leave it disconnected for at least 10 minutes to allow residual charge to dissipate from the control board. Plug it back in, select a short spin or rinse cycle, and observe whether E51 returns.
- 2
Check and reduce the drum load
Remove all laundry from the drum and try running an empty rinse cycle. If the machine completes the cycle without the error, overloading was likely stressing the motor. Going forward, keep loads within the machine's rated capacity shown on the rating plate.
- 3
Inspect the motor wiring connectors
Unplug the machine before doing this. Remove the back panel (usually held by two or three screws) to access the motor. Check that the wiring connector at the motor is firmly seated and shows no signs of burning, corrosion, or melted plastic. Reseat any loose connectors firmly by hand.
- 4
Examine the wiring harness for damage
Trace the wiring loom from the motor up to the control board, looking for any sections where the outer insulation is worn, pinched, or melted. Pay particular attention to areas where the harness passes near sharp metal edges or moving parts. Damaged wiring should be replaced rather than taped over.
- 5
Check the motor for visible damage or seizure
With the machine unplugged, try turning the motor pulley by hand. It should rotate with moderate resistance. If it is completely locked or makes a grinding noise, the motor bearings may have failed. Also look for any burn marks or a smell of scorched insulation around the motor body.
- 6
Inspect the control board for a burnt triac
Access the control board — usually located behind the top or front panel depending on your model. Look for any component that shows visible burn marks, discolouration, or a cracked casing near the motor output section of the board. A visibly damaged triac confirms the board needs repair or replacement.
- 7
Replace the control board or motor as required
If the triac on the PCB is confirmed faulty, the board will need to be replaced or sent for professional component-level repair. If the motor is seized or internally shorted, fit a compatible replacement motor. Always use parts matched to your specific model number, found on the rating plate inside the door frame.
Affected models
Select your model to see its full troubleshooting page.
When to call a service technician
If you have completed all the steps above and E51 continues to appear on every cycle, the fault almost certainly lies with the motor triac on the main control board or with the motor itself — both of which require component testing with a multimeter and specialist knowledge to diagnose accurately. Attempting to replace a PCB without confirming the root cause can result in a second board being damaged if a shorted motor is still connected.
You should also call a service technician immediately if you notice any burning smell coming from the machine, scorch marks around the motor or control board area, or if the machine trips your household circuit breaker when switched on. These are signs of an active electrical fault that should not be operated until inspected.
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Frequently Asked Questions
Can I still use my Electrolux washing machine while it shows E51?
No. E51 indicates an active electrical fault in the motor power circuit, and running the machine in this state risks causing further damage to the control board or motor. It may also trip your household electrics. Leave the machine unplugged until the fault has been diagnosed and resolved.
Will a factory reset fix error E51?
A power cycle or reset can clear E51 if it was caused by a temporary voltage spike or a one-off software glitch. However, if the triac or motor has physically failed, no amount of resetting will resolve it. If the error returns immediately after a reset, a hardware fault is present.
How much does it typically cost to repair an E51 fault?
If only the control board needs replacing, parts typically cost between £60 and £150 depending on the model, plus a service technician's labour charge. A replacement motor can add a similar amount. It is worth getting a quote and comparing it against the age and value of the machine before committing to a repair.
Could a power surge have caused my E51 error?
Yes, a mains voltage spike is a recognised cause of triac failure. If E51 appeared immediately after a power cut, storm, or the machine being on during an electrical disturbance, a surge is a strong possibility. Using a surge-protected extension lead can help protect the machine's electronics going forward.
Is E51 the same fault as E52 or E53 on Electrolux machines?
They are related but distinct. E51 specifically indicates a motor triac short circuit, while E52 and E53 relate to other aspects of motor speed and tachometer signal faults. The diagnostic steps overlap in places, but the root cause and the parts most likely to need replacement can differ between these codes.