Whirlpool Dryer Error Code F:25

F:25 indicates that the inlet thermistor has shorted. The inlet thermistor monitors incoming air temperature and sends resistance signals to the control board. A short in this component causes the resistance to drop abnormally low, triggering the fault. This code only appears during the dryer's diagnostic test mode, not during a normal drying cycle.

Because F:25 only surfaces 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 cannot accurately monitor incoming air temperature, which could contribute to improper heat regulation. It is advisable to resolve the fault before continuing regular use to avoid potential overheating.

Repair costs vary depending on the faulty component. A replacement inlet thermistor is generally an inexpensive part, typically in the range of $15 to $40. If professional labor is involved, total repair costs including diagnostics and installation can range from $100 to $250. Control board replacement, if needed, would push costs higher, often in the $200 to $400 range depending on the model.

A knowledgeable DIYer can attempt this repair by first entering the diagnostic test mode and then inspecting the inlet thermistor, its wiring harness, and connectors for visible damage or corrosion. If the thermistor itself has failed, it can be replaced as a discrete part. However, if the fault traces back to the control board or involves complex wiring damage, professional service is recommended.

Resetting the dryer by unplugging it or cycling the power will not permanently clear F:25 if the underlying component fault still exists. Since this code only appears in diagnostic test mode, it will reappear the next time diagnostics are run as long as the shorted thermistor or wiring issue remains unresolved. A lasting fix requires repairing or replacing the faulty component.