Simpson Washing Machine Error E43
⚡ Quick Answer: The E43 error on your Simpson Washing Machine indicates a malfunction in the door lock mechanism, typically due to a faulty door lock TRIAC on the mai... ✅ DIY Fixable
What Does Error E43 Mean?
The E43 error on your Simpson Washing Machine indicates a malfunction in the door lock mechanism, typically due to a faulty door lock TRIAC on the main PCB. This issue prevents the door from locking properly and may stop the machine from starting during the door lock phase.
Common Symptoms:
- Washing machine stops and displays E43 during door lock phase or at startup
- Door won’t lock or cycle won’t start
Possible Causes
- Faulty door lock TRIAC on the main PCB (medium)
How to Fix Error E43
DIY Fix Basic checks before service
- Ensure the door is fully closed and latched properly
- Check that the power has been cycled (turn off, wait, restart) to reset temporary errors
- Visually inspect the door lock area for obvious damage or obstructions
Technician Only Diagnose and repair E43 door lock TRIAC fault
- Disconnect mains power to the washing machine
- Access the main PCB and inspect the wiring harness to the door lock for damage or loose connections
- Test the door lock TRIAC on the main PCB for failure with proper electronics test equipment
- Replace the main PCB if the TRIAC circuit is confirmed faulty
- Test door lock operation after repair
Parts needed: Main PCB (control board), Door lock assembly, Wiring harness/connectors
- If the door will not physically latch or lock
- Error persists after basic user-level checks
- Technician-level diagnostic tools are required
Next step
Choose the next step for E43
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
Main Control Board
The central brain of the appliance that controls all components, cycles, and timings.
- Typical part-only price
- $120 - $280
- DIY difficulty
- Medium
- Estimated time
- 20-40 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.
Door Lock Assembly
Secures the door shut during operation for safety and signals the control board to run.
Wiring Harness
Connects controls, sensors, motors, and other electrical components inside the appliance.
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.
Affiliate disclosure: As an Amazon Associate I earn from qualifying purchases. We may earn a commission from other qualifying purchases or service requests made through links on this page, at no additional cost to you. Recommendations are based on repair relevance, not commission rate.
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 E43 error mean on Simpson Washing Machine?
E43 indicates a malfunction in the door lock mechanism, often caused by a faulty door lock TRIAC.
Can I fix Simpson Washing Machine E43 error myself?
Yes, ensure the door is closed properly and try resetting the machine by cycling the power.
How much does it cost to fix E43 error?
Repair costs for the E43 error range from $150 to $350+, depending on parts and labor.
When should I call a technician for E43?
Call a technician if the door won't latch or lock, or if the error persists after your checks.
Sources & References
- Simpson Australia Troubleshooter (official)
Data last verified: 2026-07-31
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