Bosch Oven Error Code F43 — Door Latch Will Not Unlock
What this means
Error F43 indicates the door latch is stuck locked and will not release. This commonly occurs after a self-cleaning cycle if the latch mechanism has seized, or if the latch motor has failed. The oven door cannot be opened until the latch is released.
Step-by-step fix
4 stepsWait and retry
If the oven just finished self-cleaning, wait 30–60 minutes for the oven to cool. The lock will not release until the temperature drops below a safe level.
The self-clean temperature can exceed 900°F — it takes time to cool.
Power cycle
Turn off the breaker for 10 minutes and restore power. Try pressing Cancel to reset the latch motor.
Start and cancel self-clean
Start a self-clean cycle, wait 60 seconds, then cancel. This may reset the latch to unlock position.
This trick works by cycling the latch motor through its full range.
Replace the lock assembly
If the latch remains stuck, the lock motor or assembly has seized and needs replacement.
Lubricating the latch mechanism may provide a temporary fix.
When to call a professional
If you cannot unlock the door using the steps above, a technician can manually release the latch and replace the assembly.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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