4400 <4500> (U8) Fan trouble (outdoor)

What does 4400 <4500> (U8) mean?

This error indicates a problem with the outdoor unit's fan. It could be due to a malfunctioning fan motor, a disconnected fan connector, or a defective outdoor multi controller circuit board.

• Malfunction of fan motor.
• Disconnection of CNF connector.
• Defective outdoor multi controller circuit board.

Click steps to track your progress.

1. 1

   Turn off the power to the outdoor unit at the circuit breaker.

2. 2

   Check for any obstructions around the outdoor fan that might prevent it from spinning.

3. 3

   Inspect the fan motor and its wiring connections (specifically the CNF connector) for any looseness or damage.

4. 4

   Gently try to spin the fan blades by hand to ensure they move freely without resistance.

5. 5

   Restore power to the unit. If the fan still doesn't operate or the error persists, contact a service professional.