I have a Bryant furnace plus 90 model #398AAW036060D. I just changed the blower motor. In the last five years I've changed the main board, inducer board, pressure switch, and cleaned the igniter the the the fan limit switch.
It was running well and then it got to where the inducer motor starts, burners light and run, and after the burners stop firing the blower motor runs. The furnace blows warm air. The blower stops and then the whole process starts again. What would cause this?