If the motor still running, the motor should be fine. ! V2 y' A6 [" z/ q5 P+ R4 bPossible reason: . i. J0 W1 ?5 M0 uFlame sensor, up limit sensor or the pressure differential sensor. ! d! v/ o& e- q5 Q( zOpen the control box, there maybe there is one light flashing tell you what's the promble.