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Carolyn AndrewsJul 25, 2025
What to do if Honeywell W8150 damper does not open or close?
- RRebecca HaleJul 25, 2025
If the damper on your Honeywell Fan isn't opening or closing, start by checking the wiring connections against the appropriate wiring diagram to ensure it is correctly wired. Verify that 24 Vac is applied to the actuator. If the wiring and voltage are correct, manually open the damper to check for free movement; it should return to the closed position when no power is applied. If the damper moves freely but doesn't operate with 24 volts applied, replace the damper actuator. If the damper doesn't move freely, replace the fresh air damper.