Actuator/Valve

ACTUATOR AND VALVE ASSEMBLY

The actuator is a device with a motor that “actuates” or rather opens and closes a valve that directs the water flow in your fan coil. Essentially it turns the Hot or Cool on. It is usually a small silver box that sits on top of a brass valve assembly. (can be plastic, red, blue etc.) Over time these motors burn out or succumb to the environment they operate in i.e. moisture causes corrosion and the motor seizes. The valve the actuator sits on also is subject to wear and may either seize up or start leaking. There are non-serviceable seals within valve bodies and they must be either replaced as a whole or some models do have cartridges not unlike a faucet.

Typical 2way and 3way actuator and valve assembly.

3way Actuator and valve assembly on an aging fan coil unit