How to Fix / Troubleshooting

Safety: Unplug the unit before accessing internal components.

Steps:

Locate ambient sensor: As with E1, find the room temperature sensor near the air intake behind the front grille.
Check for moisture: If the unit has been operating in very humid conditions, inspect the sensor and connector for condensation or corrosion. Dry gently with a cloth and allow time to air dry.
Inspect wiring: Look for damaged insulation or pulled wires. Reseat the connector on the main PCB.
Test and replace: Measure resistance and compare to expected values. Replace with a Hotpoint ambient thermistor if readings are abnormal.

Note: If F1 persists with a new sensor, the main control PCB may be faulty.

F1 appears on the display; unit may not respond to temperature changes or may run continuously.

Possible Causes