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Error code reference

Maytag Dryer Error Code F:25

Inlet thermistor is shorted (appears ONLY in diagnostic test mode).

Maytag codesMaytag dryer codes

Inlet thermistor is shorted (appears ONLY in diagnostic test mode).

First step from the service manual

See TEST #4a, page 6.

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

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What F:25 means on a Maytag dryer

The F:25 error code on a Maytag dryer indicates that the inlet thermistor has developed a short circuit condition. The inlet thermistor is a temperature-sensing component located at the air intake of the dryer. It monitors incoming air temperature and provides resistance-based feedback to the control board. When the thermistor shorts, its resistance drops abnormally low, signaling the control board that a fault has occurred. This code appears exclusively during diagnostic test mode, meaning it will not display during a normal drying cycle.

A shorted thermistor sends a false low-resistance signal to the control board, which the board interprets as an extremely high temperature reading. This can cause the control board to make incorrect decisions about heat regulation. Unlike an open thermistor fault, a short means the circuit is completing in an unintended path, often through damaged insulation, moisture intrusion, or a failed internal thermistor element.

Diagnosis should begin with TEST #4a as directed in the technical documentation for this model. That test will walk through checking the thermistor's resistance values and the associated wiring harness connections. A properly functioning thermistor will display a specific resistance range corresponding to the ambient temperature at the inlet. A shorted unit will show near-zero resistance regardless of temperature conditions, confirming the fault and pointing toward thermistor replacement or wiring repair.

Source: manufacturer service documentation.

Common causes of F:25

  1. 01

    Failed inlet thermistor

    Part replacement

    The thermistor itself has developed an internal short, causing its resistance to read abnormally low regardless of temperature. This is the most common root cause and typically requires thermistor replacement.

  2. 02

    Damaged wiring or insulation

    Wiring / connection

    The wiring harness connecting the thermistor to the control board may have abraded or melted insulation, allowing two wires to contact each other and create a short. Inspect the harness routing for any areas where wires contact sharp edges or hot surfaces.

  3. 03

    Moisture or contamination at the thermistor connector

    Wiring / connection

    Water or lint buildup at the thermistor's electrical connector can create a low-resistance path that mimics a shorted component. Disconnect the connector and inspect for corrosion, moisture, or debris.

  4. 04

    Faulty wiring harness connector

    Part replacement

    A damaged or corroded connector pin at either the thermistor or the control board end can cause intermittent or sustained short readings. Check that connector pins are fully seated and free of damage.

  5. 05

    Control board misreading the thermistor circuit

    Part replacement

    In rare cases, the control board's input circuit for the thermistor may be faulty, causing it to interpret a normal signal as a short. This should only be considered after the thermistor and wiring have been fully tested and confirmed good.

See the test procedure for each cause

Frequently asked questions about F:25

What does F:25 mean on a Maytag dryer?
F:25 means the dryer's inlet thermistor has been detected as shorted during diagnostic test mode. The inlet thermistor is a resistance-based temperature sensor located at the air intake. A short circuit in this component causes it to send an abnormally low resistance reading to the control board. This code does not appear during normal operation and only surfaces when the dryer is run through its built-in diagnostic test sequence.
Can I fix the F:25 error myself?
A knowledgeable DIYer can address this fault by following TEST #4a in the dryer's diagnostic procedure, which guides you through checking the thermistor and its wiring. If the thermistor itself has failed, replacing it is a moderately straightforward repair involving disconnecting the wiring harness and swapping the component. If the issue lies in damaged wiring or a corroded connector, those can sometimes be repaired without new parts.
Is it safe to run my dryer with an F:25 error?
Because F:25 only appears in diagnostic test mode and not during a normal cycle, the dryer may still appear to operate. However, a shorted inlet thermistor means the control board is not receiving accurate temperature data from the inlet, which can affect heat regulation. Continued use without addressing the fault is not recommended, as improper heat control could pose a fire hazard or result in poor drying performance.
How much does it cost to repair an F:25 error on a Maytag dryer?
If only the inlet thermistor needs replacement, parts typically cost in the range of $10 to $35 depending on the specific model. If professional labor is involved, total repair costs generally fall between $75 and $175. Wiring harness repairs or control board replacement, if needed, can increase that range significantly.
Will resetting the dryer clear the F:25 error code?
Because F:25 only appears in diagnostic test mode, it will not display as a persistent error during normal operation. However, the underlying fault in the inlet thermistor or its wiring will still exist after any reset. Simply resetting the dryer does not repair a shorted thermistor, and the fault will reappear the next time diagnostic mode is run. The component must be tested and repaired or replaced to resolve the issue.

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