Safety First: Unplug the dryer and allow it to cool completely before working near the heater assembly.

Step 1 – Locate inlet thermistor: On many KitchenAid dryers, the inlet thermistor is mounted on or near the heater housing at the rear of the drum.
Step 2 – Inspect wiring and connector: Check that the two‑wire connector is fully seated and that wires are not broken or burnt. Reseat the connector.
Step 3 – Measure resistance: Disconnect the thermistor and measure resistance at room temperature. Compare to the specification on the tech sheet (commonly around 50k ohms at room temp for inlet sensors). An open reading indicates failure.
Step 4 – Replace if open: Remove the mounting screw, install a new OEM inlet thermistor, and reconnect the harness.
Step 5 – Inspect heater housing: Check for heavy lint buildup around the heater housing and clean thoroughly to prevent overheating.

After reassembly, restore power and run a test cycle to confirm normal operation and that F24 is cleared.

Dryer displays F24 and may not heat or may shut off prematurely.

Possible Causes