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Error code reference

Thermador Range Error Code E:24

WFMC washer

Thermador codesThermador range codes

WFMC washer: Motor power relay failed (faulty control module).

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What E:24 means on a Thermador range

The E:24 error code on a Thermador range references a motor power relay failure within the control module. This fault originates from the main control board, where an internal relay responsible for supplying power to the motor circuit has either failed to close, failed to open, or is producing an out-of-spec signal. The relay is a switching component on the control board that governs when motor power is engaged, and when it fails, the control system detects the inconsistency and triggers this fault code to prevent unsafe operation.

In most cases, the fault is internal to the control module itself rather than in the wiring harness or the motor. The relay may have welded contacts, a failed coil, or degraded solder joints from heat cycling over time. Because the relay is integrated into the control board assembly, it typically cannot be serviced independently without advanced electronics repair skills. The control module must be tested for proper relay switching behavior and output voltage when commanded.

While the control module is the primary suspect, technicians should also inspect the wiring between the control board and the motor circuit for shorts, corrosion, or loose connectors before condemning the board. A short in the motor circuit can cause excessive current draw that damages the relay on the control board. Confirming motor winding resistance is within specification can rule out a motor-side fault contributing to the relay failure.

Source: manufacturer service documentation.

Common causes of E:24

  1. 01

    Failed control module relay

    Part replacement

    The motor power relay integrated into the main control board has failed internally due to welded contacts, a burned coil, or degraded solder joints. This is the most likely cause and typically requires replacing the entire control module.

  2. 02

    Short circuit in motor wiring

    Wiring / connection

    A short in the wiring harness between the control board and the motor can cause excessive current that damages the relay. Inspect harness connectors and wire insulation for burns, pinching, or corrosion.

  3. 03

    Motor winding failure

    Part replacement

    A failed motor with shorted windings can draw excessive current through the relay, causing it to fail. Test motor winding resistance with a multimeter to determine if the motor is contributing to the fault.

  4. 04

    Loose or corroded connector at control board

    Wiring / connection

    Poor electrical contact at the control board connector pins can cause intermittent relay operation and trigger the fault. Inspect all connectors at the board for corrosion, heat damage, or loose terminals.

See the test procedure for each cause

Frequently asked questions about E:24

What does E:24 mean on a Thermador range?
E:24 indicates that the motor power relay inside the main control module has failed. The control board monitors the relay responsible for delivering power to the motor circuit, and this code is triggered when that relay does not operate correctly. The appliance will typically shut down to prevent unsafe conditions. Resolving this code usually requires diagnosing or replacing the control module.
Can I fix E:24 on my Thermador range myself?
Diagnosing this fault requires testing the control board relay output and inspecting motor wiring, which involves working with electrical components and is best suited for experienced technicians or knowledgeable DIYers with a multimeter. If the control board relay has failed internally, the board will need to be replaced, which is a more involved repair. Basic wiring inspections and connector checks can be performed by a careful DIYer, but board replacement requires proper handling of sensitive electronics.
Will resetting the appliance clear the E:24 error code?
A power reset may temporarily clear the E:24 code, but if the relay has physically failed, the error will return as soon as the appliance attempts to operate the motor circuit again. Resetting does not repair the underlying hardware fault. A proper diagnostic inspection of the control board and motor circuit is necessary to resolve the issue permanently.
Is it safe to use my Thermador range while E:24 is displayed?
It is not recommended to continue operating the appliance while E:24 is active. A failed motor power relay can result in unpredictable motor behavior or a loss of control over powered components. The appliance has flagged this fault specifically to prevent unsafe operation, and using it in this state could worsen the damage or create a safety hazard.
How much does it cost to repair an E:24 error on a Thermador range?
Repair costs vary depending on whether the issue is a wiring fault or a failed control module. A wiring repair or connector service may cost relatively little in parts, while a replacement control board can range from a few hundred dollars to over five hundred dollars for parts alone, plus labor. Getting a diagnostic evaluation from a qualified technician before purchasing parts is strongly recommended to confirm the root cause.

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