Legacy Thermador CT Oven E12 (Dreefs Control Table): Second Latch Switch Reading

What E12 means

On older Thermador CT ovens with the Dreefs control, E12 sits beside E11 as another latch switch entry. The service document says the oven will not clean and recommends replacing the latch. Heat shuts off on the failed oven; turning the oven off stops the message, and you will see it again only if the selector goes back to CLEAN. CMT combination ovens share the same table, so we confirm the model on site.

Usual causes of E12

Latch switch that does not change state when the latch moves
Failed latch assembly, per the replacement advice
Loose latch connection (a technician check before replacing anything)

✓ A safe check worth trying

1. Rotate the selector to OFF with a small counterclockwise nudge to quiet the alert. 2. Switch the oven's power off for a few seconds and restore it, as the document says for E12. 3. Use bake or broil if they respond. 4. Avoid CLEAN, and call us if E12 remains with the selector OFF.

! Why you should stop here

Running CLEAN again just retests a latch that has already failed
The latch and its switches are inside the door assembly area
Our written quote comes first, and part availability is confirmed by model number

Taking off a panel yourself does not by default void a manufacturer warranty, yet it can lead to accidental damage, and some manufacturers attach their own service terms. Read your warranty paperwork, or ask us, before you decide.

→Same appliance

More Oven codes

F13Thermador C/CM/CJ Wall Oven Code F13: Power Board Not Calibrated, Air Switch Check F51F51 on an Older Thermador Wall Oven (C/CM-Series): Upper Door Stuck Unlocked F2F2 on an Older Thermador Wall Oven (SC, SCD, SM, SMW): Temperature or Door Light During Self-Clean F14Thermador Older C-Series Oven, Control Display EEPROM Error F14 F52Thermador Wall Oven F52 in the Legacy C/CM Family: Upper Door Reads Locked and Open F3Thermador Wall Oven F3 in the Legacy SC/SM Family: Open Oven Sensor F19Thermador Oven F19 (C/CM/CJ Legacy Models): Miscellaneous Power/Relay Board Error F53What F53 Means on a Legacy Thermador C/CM Wall Oven: Upper Door Stuck Locked

E12E12 questions

Why does my oven show E12 only after I choose CLEAN?

The control checks the latch when it must lock the door for cleaning. Turning the oven off clears the message, so it reappears only when CLEAN is selected again.

Can I clean the oven by hand instead?

Yes, once it is cool, with mild cleaner and a soft cloth. Skipping the self-clean cycle avoids the latch test until we repair it, and it does not harm the oven.

Should I replace the latch myself?

We do not recommend it. The latch sits close to wiring that may be live, and a wrong swap can leave the door unable to lock. We can quote the repair in writing.