So I am having issues with my furnace. I moved into a "new to me" house that was built in 2009. It has a Lennox H/E furnace with multi-zoning for the two floors and the basement.
When the furnace is on, there is cold air blowing into the basement even if the thermostat (White & Rodgers) in the basement is turned to off. The multi-zoning system is showing that the damper is open when it should be closed. Anyone have thoughts what the first troubleshooting step I should take? I figure it could be that the thermostat needs replacing but I am not sure.
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