Replacement Actuators

Replacement damper actuators and parts for Honeywell Home zoning and ventilation dampers. The collection includes M847 foot mounted and damper actuators at 24 VAC, M847D-VENT spring-closed and M847D-ZONE spring-open two-position actuators, linkage replacement parts and an MSTN motor switch terminal.

Identify the existing damper and its actuator model before ordering, and check whether the damper should fail open or closed when power is lost. Confirm voltage, timing, torque and linkage length. Spring return actuators suit ventilation dampers, while zoning dampers often use spring-open actuators.

See also: zone dampers, bypass dampers, Honeywell Home.

Popular part numbers: Honeywell M847D-ZONE, Honeywell M847D-VENT.

Frequently asked questions

Spring-open or spring-closed?

Zone dampers usually use a spring-open actuator such as the M847D-ZONE, so air keeps flowing if power is lost. Fresh air and ventilation dampers usually use a spring-closed model such as the M847D-VENT.

Can I replace only the motor on a zone damper?

Yes. The motor swaps without cutting the damper out of the duct. See zone dampers.