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Error code reference

Thermador Oven Error Code E014

ON/OFF key does not work.

Thermador codesThermador oven codes

ON/OFF key does not work.

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What E014 means on a Thermador oven

Error code E014 on a Thermador oven indicates that the control board is detecting a fault with the ON/OFF key. This key is part of the user interface keypad or membrane switch assembly, which sends input signals to the main control board. When the control board registers that the ON/OFF key is either stuck in a closed position, unresponsive, or continuously sending a signal without user input, it logs E014 and may lock out operation to prevent unintended behavior.

The most common cause of this fault is a failed or degraded membrane keypad. Over time, the conductive traces beneath the key surface can wear, corrode, or short together, causing the control board to read the key as permanently pressed or non-functional. Spills, grease buildup, or heat exposure near the control panel can accelerate this degradation. In some cases, the ribbon cable connecting the keypad to the control board may have a damaged connector or a broken trace that disrupts the signal path.

In less common cases, the main control board itself may be at fault. If the input circuit on the board that interprets the ON/OFF key signal has failed, the board may misread the key state even when the keypad is functioning correctly. Diagnosing this requires isolating whether the fault originates at the keypad assembly or the control board, typically by inspecting the keypad for physical damage and checking connector integrity before condemning the board.

Source: manufacturer service documentation.

Common causes of E014

  1. 01

    Failed membrane keypad or touchpad

    Part replacement

    The conductive membrane beneath the ON/OFF key can wear out, short internally, or become contaminated by grease and moisture, causing the control board to detect a stuck or continuous key press. Inspect the keypad surface for bubbling, discoloration, or physical damage.

  2. 02

    Stuck or physically jammed key

    Wiring / connection

    Debris, dried spills, or mechanical damage can physically jam the ON/OFF key in a depressed position. Carefully inspect and clean around the key to determine if it moves freely.

  3. 03

    Damaged ribbon cable or connector

    Part replacement

    The ribbon cable linking the keypad assembly to the main control board can develop broken traces or a loose connector, disrupting the signal from the ON/OFF key. Check for visible damage, crimping, or disconnection at both ends of the cable.

  4. 04

    Faulty main control board

    Part replacement

    If the input circuit on the control board that reads the ON/OFF key signal has failed, the board may report E014 even when the keypad itself is intact. This is typically diagnosed after the keypad and cable have been ruled out.

See the test procedure for each cause

Frequently asked questions about E014

What does E014 mean on a Thermador oven?
E014 on a Thermador oven means the control system has detected a fault with the ON/OFF key. The control board is reading the key as stuck, unresponsive, or continuously signaling. This typically points to a worn membrane keypad, a stuck key, a damaged ribbon cable, or in some cases a faulty control board.
Can I fix E014 on my Thermador oven myself?
Some cases of E014 can be addressed without professional help, such as cleaning around a stuck key or reseating a loose ribbon cable connector. However, if the membrane keypad or control board needs replacement, those repairs require disassembling the control panel and working with electrical components. Technicians with appliance repair experience can often handle keypad replacement, but control board diagnosis is more involved.
Is it safe to use my Thermador oven while E014 is displayed?
It is not recommended to continue using the oven while E014 is active. A malfunctioning ON/OFF key could prevent you from turning the oven off reliably or cause unintended operation. Have the fault diagnosed and repaired before resuming normal use.
Will resetting my Thermador oven clear the E014 error?
A power reset, such as turning off the circuit breaker for one to two minutes and then restoring power, may temporarily clear the E014 code. However, if the underlying cause such as a worn keypad or damaged cable is still present, the error will return. A reset alone is not a fix and should only be used as a diagnostic step.
How much does it cost to repair a Thermador oven with error code E014?
Repair costs vary depending on which component has failed. A replacement membrane keypad or touchpad assembly typically costs between $50 and $200 for the part, plus labor if a technician performs the repair. If the main control board needs replacement, parts alone can range from $150 to $400 or more. Getting a diagnostic estimate from a qualified technician before committing to parts is advisable.

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