Indoor unit shows F2, unit may stop in heating mode or show unstable operation.

Safety first: Turn OFF power before removing covers.

• Step 1 – Access evaporator sensor: Remove the front panel and filters. Locate the sensor clipped to the evaporator coil fins.
• Step 2 – Check mounting: Ensure the sensor is firmly attached to the coil surface; a loose sensor can misread temperature.
• Step 3 – Inspect wiring: Follow the sensor wires back to the PCB and check for cuts or loose connectors.
• Step 4 – Replace if needed: If the sensor is physically damaged, replace it with the correct Royal Clima part.

When to call a technician: If F2 persists after sensor replacement, the indoor PCB may be defective and should be tested by a professional.