Simpson Washing Machine Error E31
⚡ Quick Answer: The Simpson Washing Machine E31 error indicates a malfunction in the door lock mechanism, typically related to a pressure sensor circuit fault. This e... ✅ DIY Fixable
What Does Error E31 Mean?
The Simpson Washing Machine E31 error indicates a malfunction in the door lock mechanism, typically related to a pressure sensor circuit fault. This error may prevent the wash cycle from starting and is often accompanied by a flashing display. The main control board is not receiving the expected water level or pressure signal, which can stem from a faulty pressure sensor, wiring issues, or a control board fault.
Common Symptoms:
- Machine stops and displays E31
- Pressure sensor not reporting expected signal to main PCB
Possible Causes
- Faulty pressure/water level sensor (medium)
- Wiring harness/connectors to sensor or PCB issue (medium)
- Main control board (PCB) fault (low)
How to Fix Error E31
DIY Fix Basic checks before service call
- Turn off and unplug the washing machine.
- Check that the washer is level and that hoses are correctly connected.
- Ensure no visible damage to wiring around the pressure sensor (if accessible).
- Restart the machine to see if error persists.
Technician Only Inspect and resolve pressure sensor circuit fault
- Disconnect power and access washing machine internals.
- Inspect wiring harness and connectors between the pressure sensor and main PCB for damage or loose connections.
- Test or replace the pressure/water level sensor.
- If error persists after sensor replacement, test main PCB’s pressure sensor input circuitry and replace PCB if confirmed faulty.
Parts needed: Pressure/water level sensor, Main control board (PCB), Wiring harness/connectors
- If internal inspection reveals water damage, burnt components, or sensor cannot be accessed safely
- If error persists after basic user-level checks
Next step
Choose the next step for E31
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
Pressure Switch
Detects the water level inside the tub and signals when to start or stop filling.
- Typical part-only price
- $25 - $65
- DIY difficulty
- Easy
- Estimated time
- 15-30 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.
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 E31 error mean on Simpson Washing Machine?
E31 indicates a malfunction related to the door lock mechanism due to a pressure sensor circuit fault.
Can I fix Simpson Washing Machine E31 error myself?
Perform basic checks like ensuring the machine is level and hoses are connected, and inspect wiring for visible damage.
How much does it cost to fix E31 error?
Repair costs can range from $50 to over $300, depending on parts and labor.
When should I call a technician for E31?
Call a technician if there is water damage, burnt components, or if the error persists after your checks.
Data last verified: 2026-07-31
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