Code 66 — 18VS,19VS/V-HP/AC Outdoor Fan Dropped Out

What does 66 mean?

This fault specifically for 18VS,19VS/V-HP/AC units indicates that the outdoor fan has stopped operating or 'dropped out' unexpectedly. This can lead to overheating and system shutdown.

• Faulty outdoor fan motor
• Issue with the outdoor fan inverter or control
• Obstruction of the fan blade
• Loss of power to the outdoor fan

Click steps to track your progress.

1. 1

   Turn off the power to the outdoor unit at the circuit breaker for at least 30 seconds.

2. 2

   Visually inspect the outdoor fan for any debris or obstructions preventing it from spinning.

3. 3

   Restore power and listen for the fan to attempt to start.

4. 4

   If the outdoor fan remains non-operational, contact a qualified HVAC technician for diagnosis and repair.