Roper dryer F25: inlet thermistor shorted
F25 (F-25) means the inlet temperature sensor at the heat source reads as shorted. It appears only in the diagnostic test mode.
What F25 means
- Brand
- Roper
- Appliance
- Gas dryer
- Code
- F25
- Documented meaning
- Inlet thermistor shorted
- Applies to
- 4 Roper models on 1 platform
- Can you keep using it?
- With caution
What the dryer is detecting
The inlet thermistor watches the temperature of heated air entering the drum. A reading outside the possible range makes the control flag the sensor.
Causes listed for this condition
In the order the service documentation checks them. Documented causes come from the manufacturer's service documentation for these platforms; possible causes are based on how the system works; unconfirmed marks common assumptions that the documentation does not support.
- Documented A shorted inlet thermistor.
- Possible Wiring near the heat source that is loose or heat-damaged.
Safe checks you can make
- Turn the dryer off at the breaker (or unplug it) for about one minute, restore power and start a new cycle to see whether the code comes back right away.
Further diagnosis requires opening the appliance. Beyond the owner checks, diagnosis involves removing panels, testing components and checking wiring. We describe what a technician investigates, not how to do it yourself.
What a technician checks
- Reads the temperature sensor values in the service diagnostic mode and compares them with the room temperature.
- Checks the sensor connector at the main control and the sensor's own connection for a loose or damaged terminal.
- Tests the sensor and its circuit before deciding whether the sensor, the harness or the main control is at fault.
Typical repairs and cost
Depending on what diagnosis finds, this code can lead to one of these repairs:
| Repair | Typical range | Labor |
|---|---|---|
| Dryer exhaust thermistor replacement | $180–$290 | Light |
Typical total ranges for the Las Vegas area, parts and labor included. The final cost depends on diagnosis, the exact model, parts availability and whether other damage is found.
Can you keep using it?
Use with caution. Because this code is a diagnostic-mode code, the dryer may still run; have the sensor checked if heating is irregular.
Roper models documented with this code
Related problems and codes
Other codes documented on the same Roper platforms:
Repair or replace?
A fault code alone rarely justifies replacing a dryer. Most F25 repairs involve a single component once diagnosed. Replacement becomes worth considering when the unit is near the end of its typical 12–14-year life and the diagnosed repair is a major one. See the repair-or-replace guide.
Need F25 diagnosed in the Las Vegas area?
We repair Whirlpool, Maytag, KitchenAid, JennAir, Amana and other Whirlpool-family appliances in Las Vegas, Henderson, Summerlin and Boulder City. A model number helps but is never required to book.