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Fan and Heat Relays in the Air Handler
The relay between the air handler control unit and the blower motor is called a fan or heat relay. If the thermostat fan setting is "on" then the relays do nothing but keep the fan running. Otherwise, when the air handler controller asks for heating or cooling the relay switches the fan on.
This entry was posted in Uncategorized and tagged Air Control, Air Handler, Blower Motor, Control, Control Unit, Heating Cooling, Relays, Running, Thermostat. Bookmark the permalink.