I have a new carrier furnace (model 58MCA120-20) with a carrier flow through humidifier. It has 4 zones and is controlled by a Comfort Zone II display unit. The problem is that the humidifier will run when the furnace is off. I initially thought that it was wired incorrectly but changed my mind when I noticed the display unit indicates that the heat is on even though the furnace (blower, igniter, etc) is off. I believe there is something in the system that is keeping it awake when it should be sleeping. Not only does the display unit indicate the heat is on, but the zone dampers will move at what seems like random times even when the furnace is off for hours.
I’ve had my HVAC contractor out twice to look at the furnace. He says everything is fine and I don’t care to argue with him because I know nothing about HVAC systems. I was wondering if anybody has seen a situation like this before. Is there something I can ask my HVAC contractor to check? Any help would be greatly appreciated.