Simpson Washing Machine Error E51
⚡ Quick Answer: The E51 error code on your Simpson Washing Machine indicates a malfunction in the motor drive unit, typically caused by a short in the motor triac or ... ✅ DIY Fixable
What Does Error E51 Mean?
The E51 error code on your Simpson Washing Machine indicates a malfunction in the motor drive unit, typically caused by a short in the motor triac or current leakage in the motor circuit. This issue may result in unusual sounds during operation and the machine ceasing to function while displaying the error code. A visual inspection of the wiring and connections can help identify any obvious damage before considering further repairs.
Common Symptoms:
- Machine stops with E51 displayed
- Motor circuit fault detection
Possible Causes
- Motor triac short / current leakage in motor circuit (medium)
- Damaged motor wiring harness or connections (medium)
How to Fix Error E51
DIY Fix Basic visual inspection and reset
- Turn off and unplug the washing machine
- Visually inspect accessible wiring to the motor and PCB for obvious damage or loose connections
- Plug in and power on to see if the error recurs
Technician Only Inspect motor circuit and replace faulty components
- Disconnect power and open machine cabinet
- Test motor windings and insulation for leakage to earth
- Inspect and test motor wiring harness for shorts or damage
- If motor is damaged, replace motor assembly
- If wiring harness is damaged, repair or replace wiring
- If PCB motor triac circuit is determined faulty, replace main PCB
Parts needed: motor assembly, motor wiring harness, main PCB
- If error persists after basic inspection
- If you are not experienced with appliance electrical diagnostics
Next step
Choose the next step for E51
Confirm the diagnosis before ordering. An error code can identify the system involved, but it does not prove that a specific part has failed.
Most relevant component to inspect
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
- Typical part-only price
- $20 - $120
- DIY difficulty
- Medium
- Estimated time
- 30-90 mins
Where can I find the model number?
Check the rating label around the door, lid, frame, rear panel, or inside the appliance cabinet. Use the complete model number, including suffixes.
Verify the complete model and part number on the retailer's compatibility page before ordering.
Other parts options
Check related components first; use model search as a fallback.
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
Model-compatible Washing Machine parts
Enter the complete model number to browse compatible replacement parts. This is a model-based parts search, not a diagnosis that a specific component failed.
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Optional routine care
Maintenance supplies
These products support cleaning or routine upkeep. They are separate from the possible repair components above and are not claimed to fix this error code or symptom.
Washing Machine Cleaner Tablets
Routine tub-cleaning supplies for residue and odor control. They do not repair a mechanical, drainage, or electronic fault.
Braided Washer Inlet Hoses
A maintenance replacement option for visibly worn external fill hoses. Verify thread size, length, and hot/cold connection requirements.
Washer Drain Hose Holder
Helps secure an external drain hose at the standpipe. It does not correct an internal pump or control fault.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. Recommendations are based on routine-care relevance, not commission rate.
Technical Specifications
| note | The previous model-independent part specification was removed. Verify the full model number and diagnosis in the manufacturer's official parts catalog before ordering. |
|---|---|
| part_number | None |
Common Questions
What does E51 error mean on Simpson Washing Machine?
E51 indicates a motor drive unit malfunction, often due to a motor triac short or current leakage.
Can I fix Simpson Washing Machine E51 error myself?
Yes, you can perform a basic inspection of the wiring and reset the machine to see if the error recurs.
How much does it cost to fix E51 error?
Repair costs for E51 can range from $150 to $500 or more, depending on parts and labor.
When should I call a technician for E51?
Call a technician if the error persists after your inspection or if you're not comfortable with electrical diagnostics.
Data last verified: 2026-07-31
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