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Error code reference

Thermador Range Error Code E:01

WFMC washer

Thermador codesThermador range codes

WFMC washer: Door open (door lock not engaged).

First step from the service manual

Close door, check lock.

The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What E:01 means on a Thermador range

The E:01 code on this unit indicates that the door is detected as open or that the door lock mechanism has not engaged properly. The control board monitors the door lock switch as a safety interlock, and when it does not receive confirmation that the door is fully latched and locked, it halts operation and triggers this fault. The door lock assembly contains a switch or sensor that sends a signal to the control board confirming a secure closure, and any interruption in that signal will produce this error.

The most common trigger is simply a door that has not been closed firmly enough to engage the latch. However, the error can also appear when the door strike, latch hook, or lock mechanism is worn, damaged, or misaligned, preventing full engagement even when the door appears closed. A failed door lock actuator or a broken switch within the lock assembly can also cause a false open-door reading, since the control board relies entirely on that electrical signal to confirm the door state.

Diagnosing this code begins with a physical inspection of the door and latch. Check for obstructions around the door gasket or latch area, inspect the strike plate alignment, and confirm the lock mechanism moves freely and clicks into place. If the door closes and latches but the error persists, the door lock switch or wiring harness connection is the next area to inspect for continuity or damage.

Source: manufacturer service documentation.

Common causes of E:01

  1. 01

    Door not fully closed

    Wiring / connection

    The door was not pushed shut firmly enough to engage the latch. Close the door with firm pressure and listen for an audible click indicating full engagement.

  2. 02

    Worn or damaged door latch

    Part replacement

    The latch hook or strike plate can wear down over time, preventing the lock from fully engaging even when the door is pushed closed. Inspect the latch for visible wear, deformation, or breakage.

  3. 03

    Misaligned door or strike plate

    Wiring / connection

    If the door has sagged or shifted, the latch hook may no longer line up correctly with the strike plate. Check the door alignment and inspect the hinge condition.

  4. 04

    Faulty door lock switch

    Part replacement

    The switch inside the lock assembly that signals the control board may have failed, causing the board to read the door as open even when it is latched. Testing the switch for continuity will confirm this failure.

  5. 05

    Loose or damaged wiring connection

    Wiring / connection

    The wiring harness connecting the door lock switch to the control board may have a loose connector or damaged wire, interrupting the signal. Inspect the connector at both the lock assembly and control board ends.

See the test procedure for each cause

Frequently asked questions about E:01

What does E:01 mean on a Thermador range?
The E:01 code indicates that the door is detected as open or that the door lock has not engaged. The control board requires a confirmed lock signal before allowing operation to proceed. This is a safety interlock function built into the appliance. Closing the door firmly is the first step to resolve it.
How do I fix the E:01 error on my Thermador range?
Start by closing the door firmly and checking that nothing is blocking the latch area. If the error clears, the door simply was not fully latched. If the error persists, inspect the door latch, strike plate, and lock mechanism for wear or misalignment, and check the wiring connection to the lock switch.
Is it safe to use my Thermador range while E:01 is showing?
The E:01 code is a safety interlock, and the appliance is designed to halt operation when this fault is active. You should not attempt to bypass the error or force continued use. Address the door lock issue before operating the unit again.
How much does it cost to repair an E:01 error on a Thermador range?
If the fix is simply closing or realigning the door, there is no parts cost involved. If the door latch or lock switch needs replacement, parts and labor costs typically range from $75 to $250 depending on the specific component and local labor rates. A wiring repair may fall on the lower end of that range.
Will resetting my Thermador range clear the E:01 error?
A reset may temporarily clear the error code, but if the underlying cause such as a faulty latch or failed lock switch is not corrected, the code will return as soon as the appliance attempts to verify door status again. Resolve the physical door lock issue first for a lasting fix.

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