Bosch
WFMC8440UC/13
Washing Machine
Bosch WFMC8440UC/13 — Error Code E43
Bosch WFMC8440UC/13 error code E43: Door lock triac failure (control board).
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Methodology: We combine manufacturer references with recurring service patterns, then review for safe, step-by-step repair guidance.
Sources: Manufacturer fault-code sheets, service manuals, and recurring field-repair patterns.
Limits: Guidance is informational and may not match every model-year or revision. Confirm with the official manual and diagnostics before replacing parts. For safety-critical or electrical work, use a qualified technician.
Looking for the full diagnosis and repair guide? View complete Bosch Washing Machine error code E43 guide →
Repair guidance: the symptoms and steps below come from the canonical Bosch Washing Machine E43 guide and apply to WFMC8440UC/13 unless your manual says otherwise.
Symptoms on WFMC8440UC/13
- ⚠️ Cycle won't start
- ⚠️ Door won't open after cycle
- ⚠️ Error code on display
How to Fix Error E43 on WFMC8440UC/13
- 1 Unplug the washing machine for 60 seconds then plug back in — this resets the control board and clears many temporary faults
- 2 Check door seal for debris or warping preventing full closure
- 3 Test the door latch mechanism — if it clicks but machine won't start, the switch is faulty
- 4 Replace the door lock assembly ($25–$80 part, 15–30 min DIY)
- 5 Check all wiring harness connections to the main control board — reseat any loose connectors
🛠️ You'll need: Screwdriver set, Multimeter
· Time: 30–90 min
Questions People Also Ask for Error E43
What does Bosch Washing Machine error code E43 mean? ▼
Error code E43 on a Bosch Washing Machine means: Door lock triac failure (control board). The appliance detected this condition and has stopped or limited operation to prevent further damage.
How do I fix Bosch Washing Machine error code E43? ▼
First, unplug the washing machine for 60 seconds to reset the control board. If error E43 returns, the root cause (door lock triac failure (control board)) needs to be addressed — check connections, filters, and hoses before calling a technician.
Is it safe to use my Bosch Washing Machine with error code E43? ▼
It depends on the cause. Most E43 errors mean the appliance has stopped itself as a safety measure. Check the 'Should I unplug it?' section above for specific guidance on this error.