The short answer
4d12 on an oven of this generation means the oven door latch assembly or the door switch and the wiring between them never confirmed the position the control drove it to. The cycle is held rather than the machine being unsafe: the control will not commit without a door it can verify.
What the documentation says about this code
Reference| Code | Documented meaning |
|---|---|
| 4d12 | There may be a problem with the Oven Door Latch Assembly, the Door Switch, or the associated wiring. |
What an owner observes
- You hear the lock motor run and nothing latches — The motor turns, the cam does not reach its stop, and the switch never changes state.
- The door has become harder to close over the last few months — A gradual change is a hinge or a seal moving, and it ends in exactly this code.
- NEAR MISS - the door is locked and the display is dark — A dark display with a locked door is a power fault, and the release for it is a different procedure.
Causes, and why they rank that way
- Something in the way of the door or the strike — Ranked first because it needs no tools: a packed load, a rack proud of its rail or a bent strike stops the door short of the position the switch reports.
- The switch inside the latch not changing state — Second: the contact is the part that wears, and it fails to make long before the motor stops turning.
The order to work through it
- Open the door and look along the strike and the seal — Free, and it finds the obstruction that causes most of these.
- Shut the door firmly and watch whether the lock completes its travel — Listening tells you whether the motor is running at all.
The owner-side procedure
- Power down at the breaker so the lock can home itself — On the next power-up the control drives the lock to a known position, which clears a mid-travel stall.
About 10 min
- Check the hinges and the seal for an obvious drop — A door sitting low on its hinges misses the strike by a few millimetres, which is enough.
About 10 min
- STOP HERE if the lock assembly has to come out — Leave the door switch and its wiring exactly as the manufacturer fitted them: they are what keeps the machine from running with the door open.
The safety line on this appliance
Safety
Unplug the appliance or switch off its breaker before removing any panel - a capacitor can hold a charge after the power is off. Leave every switch and interlock wired as the manufacturer fitted it: they are what stops the appliance running in a state it should not.
Where an owner stops and a technician starts
The free checks above come first; past them this is a visit. Call when the door still will not lock with a clear opening, or when the code returns after a power-down: a lock motor and its switch are a single service assembly on most of these machines. Call before using it if the door can be opened while a cycle is running.
Neighbouring codes on this appliance
How far this page applies
Scope, stated plainly: the model lines that lock the door under control rather than by hand, and this code only. Model-specific detail - the pinouts, the resistance values, the part numbers - is not on this page, because those differ between families and a wrong figure here would be worse than no figure. The index linked below lists the pages for specific families and models where they exist, and a page about your model outranks this one.
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