OK gurus of HVAC if you're out there. I've gone round and round with this and have had 2 different hvac guys fail. I need 24v to switch humi on WITH furnace (obvious to me but not the DB that did our new system), and can't figure out how to get it off furnace board. can I just use the same terminals on my t stat that run furnace?
edit: ok my t stat wires get 24v when the blower is off. WTH?