I apologize if this is a repeat question...
with all 3 of my thermostats removed from their bases and even having their input terminations on the ncm300 pcb disconnected, i am getting around 24v outputs on zones 1 and 2 damper.....?? The same thing happens when all three thermostats are connected and with wiring terminated. It seems to me this would be a ncm300 pcb failure but, im only a diy'r. Can you please help?
thanks,
waterdawg68
Ncm300
Re: Ncm300
When the board is idle there will be power on terminals 1-2 all the time and terminal 1-4 when board is idle. Call the office and will go into more detail.