F37 appears; washer-dryer may not heat water properly.

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

• Inspect NTC and wiring: Access the temperature sensor at the heater bracket. Check for moisture or detergent residue in the connector. Dry and clean as needed.
• Test sensor: Measure resistance of the NTC at room temperature. If reading is near 0 ohms (shorted), replace the sensor.
• Check for shorts: Inspect the harness from the sensor to the control for damaged insulation or contact with metal parts. Repair or replace wiring as needed.
• Control board: If sensor and wiring are good, the control’s input circuit may be faulty and require board replacement.