F24 appears; the washer-dryer may stop heating water or may abort the cycle early.

Safety first: Disconnect power and allow the tub area to cool.

• Locate NTC sensor: Remove the rear panel and find the temperature sensor mounted in the heater bracket at the bottom of the tub.
• Inspect wiring: Ensure that the sensor connector is fully seated and that the harness is not damaged or pinched.
• Measure resistance: Disconnect the sensor and measure its resistance at room temperature. Compare it to KitchenAid specifications. If the reading is open, shorted, or far out of range, replace the sensor.
• Check heater for shorts: A shorted heater can skew temperature readings. Test for continuity between the heater terminals and ground; replace the heater if shorted.
• Replace NTC if faulty: Install the correct replacement sensor, secure it in the bracket, reconnect the wiring, and reassemble the rear panel.
• Test cycle: Restore power and run a warm wash cycle to confirm proper heating and that F24 is cleared.