Gas pack blower fan won't shut off, replaced fan board
So a local hvac company came out and diagnosed my fan control board as being bad. My gas pack indoor fan and combustion fan kick on as soon as I send power to the unit. I replaced the board with a new Honeywell st9120u (the new board) and it did the same exact same thing. I'm racking my brain as to what else could be causing this to happen. I find it hard to believe that the new board could have the same exact problem the old board had. We were able to bypass the board and call for heat to fire up. Really thought the new board would fix this problem. Any help would be appreciated. The unit is a comfortmaker gas pack PGAA36E1K7.