Washer-dryer stops mid-cycle, may not heat water; F03 displayed.

Safety: Disconnect power and allow the machine to cool before working near the heater.

• Locate the NTC: On most Hotpoint washer-dryer combos, the NTC sensor is mounted in the heater housing at the bottom of the tub or in the sump area. Remove the rear or front lower panel as required.
• Check connections: Inspect the NTC plug and wiring for corrosion, moisture, or loose fit. Dry any moisture, clean contacts, and reseat the connector firmly.
• Test the NTC (advanced): Disconnect the NTC and measure resistance with a multimeter. At room temperature (20–25°C), many NTCs read between 20–30 kΩ (check service data if available). A reading of open circuit or near 0 Ω indicates failure.
• Inspect wiring to PCB: Trace the harness from the NTC to the main control board. Look for breaks, chafing, or burnt sections. Repair or replace damaged wiring.
• Replace parts as needed: If the NTC is out of spec, replace it. If the NTC and wiring are good but F03 persists, the main control board temperature circuit is likely faulty and the PCB should be replaced.