I have a Carrier Performance 96 (2 stage, variable speed blower) which I have set for the fan to run continuously. I notice that every time the furnace starts up, the blower will stop completely for approx 20-30 seconds during the furnace's startup routine, and then come back on at the appropriate speed for whichever stage it started in..
Is this normal? If so, any ideas as to why does it does this? The fan has no problem increasing or decreasing speed at any other time.