Amana Dryer Error Code F:25

F:25 on an Amana dryer means the inlet thermistor has been detected as shorted during Diagnostic Test Mode. The inlet thermistor is a sensor that monitors incoming air temperature, and a short means its resistance has dropped to an abnormal level. This code only appears during the dryer's built-in diagnostic routine, not during regular operation. It signals that the thermistor or its associated wiring circuit needs inspection.

The F:25 code only appears in Diagnostic Test Mode and will not interrupt a normal drying cycle on its own. However, a shorted inlet thermistor means the dryer cannot accurately monitor incoming air temperature, which could affect drying performance or thermal safety controls over time. It is advisable to diagnose and resolve the fault before continued heavy use.

Because F:25 only appears during Diagnostic Test Mode, exiting the diagnostic routine will cause the code to stop displaying. However, resetting or power cycling the dryer does not repair the underlying shorted thermistor circuit. The next time a diagnostic test is run, the code will return until the faulty component or wiring is actually repaired or replaced.

A knowledgeable DIYer can tackle this repair by following TEST #4a in the diagnostic procedure. The process involves checking the resistance of the inlet thermistor and inspecting the wiring harness for damage or pinched conductors. If the thermistor measures a near-zero resistance when disconnected from the control board, it has shorted and needs replacement. Always disconnect the dryer from power before inspecting or replacing any components.

If the inlet thermistor is the faulty part, replacement thermistors typically cost anywhere from $15 to $50 depending on the specific part. If a technician is hired for the diagnosis and repair, total labor and parts costs generally fall in the range of $100 to $250. Control board replacement, if required after ruling out the thermistor and wiring, would push costs considerably higher.