F21Warning
Haier Oven/Range F21 Error Code
The door lock mechanism is not engaging or disengaging properly during self-clean cycle.
Common causes
- Faulty door lock motor or assembly
- Obstruction in door lock striker
- Control board failure
How to fix it
- Unplug the oven.
- Inspect the door lock assembly for visible damage or blockage.
- Manually check if lock moves freely (with power off).
- Clean any debris from latch area.
⚠ When to call a pro: If lock is intact but not working, replace door lock assembly or control board.
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Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.