Simpson Washing Machine Error E40
⚡ Quick Answer: The E40 error code on your Simpson Washing Machine indicates a malfunction in the door lock mechanism. This prevents the door from locking securely, w... ✅ DIY Fixable
What Does Error E40 Mean?
The E40 error code on your Simpson Washing Machine indicates a malfunction in the door lock mechanism. This prevents the door from locking securely, which in turn stops the machine from starting. Symptoms include the machine not starting or proceeding with the wash cycle, and the error may display immediately after powering on, even if the door appears closed.
Common Symptoms:
- Machine won’t start or proceed with cycle
- E40 displayed immediately after power on or when attempting to start wash
- Door/lid appears closed but error persists
Possible Causes
- Door/Lid not fully closed (medium)
- Faulty door lock mechanism or sensor (medium)
How to Fix Error E40
DIY Fix Check and secure closure of the door/lid
- Ensure the washer is powered off.
- Open and then firmly close the door/lid, listening for a secure click.
- Check for laundry caught in the door seal that may prevent full closure.
- Attempt to restart the wash cycle.
DIY Fix Inspect for overload or obstructions
- Remove some laundry if the machine is overloaded.
- Check that clothing is not obstructing the door from closing fully.
- Try running a test cycle with a light load.
Technician Only Inspect and possibly replace the door lock assembly or sensor
- Disconnect power to the machine.
- Remove the washing machine access panel to reach the door lock assembly.
- Inspect wiring and connections for damage or corrosion.
- Test lock mechanism and sensor for continuity or correct functionality.
- Replace failed door lock/sensor parts.
- Reassemble and retest operation.
Parts needed: Door lock assembly, Door lock sensor, Associated wiring/connectors
- If the error persists after ensuring correct door closure and checking for obstructions
- If the door lock assembly or sensor testing indicates electrical faults
- If there are signs of wiring damage or intermittent lock engagement
Next step
Choose the next step for E40
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
Door Lock Assembly
Secures the door shut during operation for safety and signals the control board to run.
- Typical part-only price
- $30 - $75
- DIY difficulty
- Easy
- Estimated time
- 10-20 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.
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.
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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 E40 error mean on Simpson Washing Machine?
E40 error indicates a door lock malfunction, preventing the machine from starting.
Can I fix Simpson Washing Machine E40 error myself?
Yes, check the door closure and remove any obstructions to attempt a fix.
How much does it cost to fix E40 error?
Repair costs vary by model and region, typically moderate for parts and labor.
When should I call a technician for E40?
Call a technician if the error persists after checking the door or if electrical faults are suspected.
Sources & References
Data last verified: 2026-07-31
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