NCM 300 not working?
NCM 300 not working?
My NCM circuit board appears to be malfunctioning. It controls two zones. At times one zone damper won't open, even when fan is running. In the last few days, the damper opens and the fan doesn't run. Sometimes neither will run. Sometimes the damper will be open and the fan won't run. If I leave both thermostats off for several hours, it will restart and run normally, but fail again after several hours. Is there a remedy or does this indicate that a replacement controller is necessary?