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Error code reference

Mabe Dryer Error Code E25

Open control thermistor.

Mabe codesMabe dryer codes

Open control thermistor.

First step from the service manual

Remove wires from the control thermistor. Measure resistance of the thermistor. If the reading is not 50K (+/-10%), replace thermistor. If the reading is within 50K (+/-10%) check wiring between thermistor and electronic control. If good, replace electronic control.

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

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What E25 means on a Mabe dryer

The E25 error code on a Mabe dryer indicates an open circuit condition in the control thermistor. The control thermistor is a temperature-sensing component that continuously monitors heat levels within the dryer and sends resistance-based signals to the electronic control board. When the control reads an open circuit from this thermistor, it cannot verify safe operating temperatures and triggers E25 to halt operation and prevent potential overheating.

The diagnostic threshold for this thermistor is 50K ohms, with an acceptable tolerance of plus or minus 10 percent. A reading outside this range, whether much higher due to an open circuit or drifting component, or much lower due to a short, points to a failed thermistor that requires replacement. If the resistance reads within the acceptable 50K range, the thermistor itself is functioning correctly and the fault lies elsewhere in the circuit.

When the thermistor resistance checks out, the next area of investigation is the wiring harness between the thermistor and the electronic control board. Broken wires, corroded connectors, or loose terminals can interrupt the signal and produce an open-circuit reading at the control. If the wiring is intact and properly connected, the electronic control board itself may be misreading the signal or has a failed input circuit, making board replacement the final resolution.

Source: manufacturer service documentation.

Common causes of E25

  1. 01

    Failed control thermistor

    Part replacement

    The thermistor has developed an open circuit internally, causing its resistance to fall outside the acceptable 50K ohm range. Removing the wires and measuring resistance directly across the thermistor terminals will confirm this if the reading is not within 50K plus or minus 10 percent.

  2. 02

    Broken or damaged wiring harness

    Wiring / connection

    A wire in the harness running between the thermistor and the electronic control board may be broken, corroded, or disconnected. Visually inspect the harness and connectors for damage, and check continuity along each wire.

  3. 03

    Corroded or loose thermistor connector

    Wiring / connection

    The connector at the thermistor terminals can develop corrosion or a loose fit over time, interrupting the resistance signal to the board. Disconnecting and inspecting the connector pins for oxidation or bent contacts is a quick check.

  4. 04

    Faulty electronic control board

    Part replacement

    If the thermistor resistance measures correctly at 50K ohms and the wiring shows no faults, the control board's thermistor input circuit may have failed. Replacing the board is the final step after all other causes have been ruled out.

See the test procedure for each cause

Frequently asked questions about E25

What does E25 mean on a Mabe dryer?
E25 on a Mabe dryer signals an open circuit detected in the control thermistor. The thermistor is a temperature-sensing component that should measure approximately 50K ohms of resistance. When the electronic control board cannot detect a valid signal from the thermistor, it displays E25 and stops the dryer to prevent unsafe operation.
Can I fix the E25 error myself?
A knowledgeable DIYer can diagnose this error by disconnecting the thermistor wires and measuring resistance with a multimeter. If the reading is not within 50K ohms plus or minus 10 percent, replacing the thermistor is a straightforward repair. If the thermistor reads correctly, tracing and inspecting the wiring harness is also manageable, though board replacement requires more comfort working with appliance electronics.
Will resetting the dryer clear the E25 error?
A reset may temporarily clear the error code, but if the underlying fault persists, E25 will return as soon as the dryer attempts to operate. The thermistor open-circuit condition must be corrected by replacing the faulty component or repairing the wiring before the error will stay cleared.
Is it safe to use the dryer while E25 is displayed?
You should not continue using the dryer with an active E25 error. The control thermistor provides the board with temperature data needed to prevent overheating. Operating the dryer without a functioning thermistor signal removes that safeguard and could create a fire hazard.
How much does it cost to repair a Mabe dryer E25 error?
If the thermistor has failed, the part itself is generally inexpensive, typically in the range of $10 to $40 depending on availability. If a wiring repair is needed, costs depend on the extent of the damage. A failed electronic control board is the most expensive outcome, with parts alone often ranging from $80 to $200 or more, plus labor if a technician performs the repair.

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