Originally Posted by jpires
i don't have HUM or EAC on my confortmaker furnace
how can i connect humidifier to come on only when the blower is on
i try C terminal and W is working but shuts down when the burner goes off.
some help please
You have to do what I mentioned above. For instance, the Aprilaire automatice control can be wired to turn the fan off and on with a call for humidity. It will require you to use a seperate transformer and also has an outdoor sensor.
Or you can buy a new thermostat that has a humidity feature and wire the humidifier into it and you wouldnt need the seperate transformer. The thermostat would give you the option in the installer menu to either have the humidifier run on a call for heat, or it could be set to run the fan and humidify on a call without heat also.