I have a Bryant furnace and no AC. I also have a programmable thermostat that has a switch on the bottom for the fan with two positions, Auto and ON. Currently if the furnace kicks on I have the fan switch at auto and the fan kicks on as it should. I would like to be able to move the switch to ON and turn the fan on constantly. Currently if I move the switch to ON it doesn't do anything. I was wondering if anyone knew how I should wire this so that it will do what I want? What terminal on the thermostat goes to what on the furnace? or can I jump somthing on the thermostat to make this switch work? Thanks for any help.