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Bosch·Washermedium severity
Bosch Error Code E43
Door lock motor error
Common Causes
- 1Lock motor failure
- 2Control board relay issue
- 3Wiring damage
If the door is locked with laundry inside, the emergency release pull tab is behind the pump filter panel at the bottom front. Pull the tab to manually release the door before servicing.
Step-by-Step Troubleshooting
- 1
Power cycle the washer — wait 5 minutes before retrying
- 2
Check door lock motor for 120VAC at connector during lock attempt
- 3
Measure lock motor coil resistance (expect 800-1200 ohms)
- 4
If voltage present but motor does not engage, replace door lock assembly
- 5
If no voltage at connector, inspect control board relay
Pro Diagnostic Tip
E43 differs from E27 — E43 specifically indicates the motorized lock actuator failed (not the detection circuit). On EcoSilence Drive models, the board uses a separate relay for the lock motor. A failed relay gives E43 even with a good lock.
You Might Also Notice
- •Door locked and will not release
- •Clicking sound from door area repeatedly
- •Door unlock delayed after cycle
Parts, Cost & Difficulty
Repair Difficulty
Hard — Advanced Skills RequiredEstimated Repair Cost
$150–$350
Parts + labor. Free diagnosis with repair.
Parts That May Need Replacement
12-008-693-001 (door lock assembly)12-005-592-003 (main control board)
Do You Have the Right Tools?
Bearing puller set ($120), drum spider wrench ($85), multimeter ($85), and diagnostic software. Our technician arrives with $15K+ in professional tools — your diagnostic is free.
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Frequently Asked Questions
What does Bosch error code E43 mean?
Bosch error code E43 indicates: Door lock motor error. This is a medium-severity issue affecting your washer.
How do I fix Bosch error code E43?
Power cycle the washer — wait 5 minutes before retrying Then, Check door lock motor for 120VAC at connector during lock attempt Then, Measure lock motor coil resistance (expect 800-1200 ohms) There are 2 more steps — see the full troubleshooting guide above. This repair typically requires professional tools and expertise.
How do I know if my washer has error E43?
Besides the error code on the display, common signs include: Door locked and will not release; Clicking sound from door area repeatedly; Door unlock delayed after cycle. If you notice any of these symptoms, check your washer's display panel for error code E43.
How much does it cost to fix Bosch E43?
Repair costs for Bosch E43 typically range from $150 to $350 depending on the specific cause and parts needed. EasyBear offers free diagnosis when you proceed with the repair. Call (415) 795-7300 for a same-day appointment.