KitchenAid Dryer F24 Error: Inlet Thermistor Fail
What Does KitchenAid Dryer Error Code F24 Mean? F24 on a KitchenAid dryer indicates the inlet thermistor is reading out of range. The inlet thermistor monitors the temperature of air entering the drum — it is a separate sensor from the outlet thermistor that causes F22. When the board cannot read a valid value from […]
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. Without a valid inlet temperature reading, the dryer cannot safely control its heater. F24 must be resolved before further use.
Can I reset the code?
No. Hardware sensor or wiring faults do not clear with power cycling.
When to stop immediately?
Stop if you notice: Burning smell during any attempted cycle, Inlet area unusually hot during a brief test.
Symptoms You May Notice
Cycle halts with F24 displayed
The drum stops and the heater shuts off mid-cycle. F24 appears on the control panel and further operation is blocked.
Drying performance had been declining
Before F24 latched, recent cycles may have been taking longer or producing inconsistent results because the board could not properly control heater cycling from drifting inlet readings.
F24 persists across cycle types
Attempting any cycle produces F24 within seconds because the board reads the sensor at power-up, before the cycle begins.
Possible Causes
Inlet thermistor failed
The NTC thermistor at the inlet airflow location has failed open or shorted. Less exposed to heat than the outlet thermistor but still subject to long-term thermal cycling fatigue.
Requires ProfessionalInlet thermistor wiring harness broken
The wiring between the inlet sensor and the main board has broken or been pinched during a prior service call, producing an open-circuit reading even though the sensor itself is fine.
Requires ProfessionalControl board analog input for inlet sensor
The input circuit on the main control board that reads the inlet thermistor channel has failed, producing invalid values regardless of sensor condition.
Requires ProfessionalSafe Checks You Can Do
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1
Verify vent airflow first
Clean the lint filter and check the vent path. A restricted vent can contribute to inlet temperature reading problems even with a working sensor. This is the same preliminary check as F22.
Never ignore vent cleaning when any dryer thermistor fault appears — poor airflow amplifies sensor issues and is a fire risk in its own right.
Tools required -
2
Schedule service for sensor replacement
F24 requires a technician to access the inlet thermistor and test it against specification. This is not a homeowner repair on most KitchenAid dryer platforms.
The inlet thermistor is typically behind a back panel and requires partial dryer disassembly. Have the service technician bring the correct replacement part.
When to Call a Professional
Contact a qualified technician if:
- Inlet thermistor replacement clears the fault
- Harness test fails at the main board connector
- Sensor resistance significantly out of specification
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