Thermador Legacy Oven, Dreefs Control Code E15: Board Replacement on CT/CMT Models

What E15 means

E15 is the last entry in the Dreefs table for older Thermador CT and CMT ovens. It names the control board; the second page says the oven is unusable and the Dreefs board should be replaced. All heat shuts off while the microwave on combination units keeps working. The message stays on the display until the board is repaired and the oven is powered back up, so resets are unlikely to hold.

Usual causes of E15

Control board problem, the single cause the source lists
Board failure affecting heat output for the whole oven side

✓ A safe check worth trying

1. Turn the selector to OFF; if the alert continues, a small counterclockwise tweak should stop it. 2. If you have a combination model, test the microwave side only if it responds. 3. Leave the oven side off. 4. Switch the oven's power off at the breaker and call us to book an inspection.

! Why you should stop here

There is no safe user adjustment for a failed board
Board replacement needs live-circuit access and careful reconnection
We confirm the legacy board by model number and quote in writing before work

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

F12F12 on a Legacy Thermador C-Series Oven: Vcc Lift-Off on the Power/Relay Board F50Older C/CM-Series Thermador Wall Oven F50: Upper Door Signal Shorted Low F1Older SC/SM-Series Thermador Wall Oven F1: Element Supervisor Enabled 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

E15E15 questions

Why does the microwave work when the oven does not?

The source says the microwave is not affected by this code. Only the heating side is disabled, which is why a combination oven may still reheat food while baking is unavailable.

Is E15 the same as E10?

They share the same behavior notes in the table: all heat off, microwave unaffected, message stays until repair. E10 names a checksum problem, while E15 simply calls for the board, so we test both the same way.

How soon should I call?

As soon as it suits you. The oven is not dangerous when its heat is off, but it cannot bake until repaired, and an early visit lets us quote the repair before your next meal plan.