Oven Cannot Tell Whether the Door Is Locked (Bosch Oven E126)

What E126 means

A small switch tells the oven whether the door latch is open or closed, and E126 means its signal has vanished. With no way to know the lock state, the control cuts power to every heating element rather than guess. Bosch says this is cleared only through a software reset, since the latch cannot recover on its own. Technicians are pointed to three places: the switch plugs, the cabling to the control, and the switch itself.

Common causes of E126

Latch position switch worn out or misaligned
Wire to the control module snapped
Plug at the latch mechanism working loose

✓ One safe check you can try

1. Switch the breaker off for a couple of minutes; that serves as the software reset. 2. Switch it back on and see if heating returns. 3. If it does and E126 stays gone, jot down the date. 4. If the code comes back, the switch or its wire is the problem, and more resets will not help.

! Why to stop there

The latch switch and its wires sit inside the door frame, close to live parts.
Repeated resets can mask a failing switch until it quits at a bad moment.
A bad switch and a broken wire give the same code, so guessing at the part wastes money.

Opening a panel yourself does not automatically cancel a manufacturer warranty, but it can cause accidental damage, and some manufacturers set their own service conditions. Check your warranty terms, or ask us, before deciding.

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Other Oven codes

E223Lower Probe Reads Colder Than Allowed (Bosch Oven E223) E226Bosch Oven E226 After the Lower Door Latch Signal Is Lost E312The Control Board's Own Heat Sensor Died (Bosch Oven E312) E314Bosch Oven E314 When the Cancel or Off Key Reads Stuck E414Off Key Failure Logged Behind the Scenes, Bosch Oven E414 E201Bosch Oven E201 on a Double Wall Model, Lower Cavity Sensor Reads Open E204Lower Sensor Wire Touching Metal: Bosch Oven E204 on Double Ovens E206Lower Oven Door Would Not Lock (Bosch Oven E206)

E126E126 questions

Why does the oven refuse to heat?

Because it cannot confirm the door is locked, and heating with an unknown door state is unsafe. Disabling the elements is the control's way of protecting you.

Will a reset always work?

It can clear a one-time glitch, so one try is reasonable. If the switch or its wiring is failing, E126 will come back, usually sooner each time, and the oven stays down.

Can the switch be repaired?

Usually the switch is replaced, or a loose connector is re-seated. We find the cause first and give a written price, with a 30-day workmanship warranty on our work.