If the motor still running, the motor should be fine. 6 y4 p3 X$ S; ~( I1 r8 NPossible reason: 7 N4 a% Q+ o; W* K1 o6 EFlame sensor, up limit sensor or the pressure differential sensor. & j% u3 Q( u7 P* P7 i( ?: N4 `+ TOpen the control box, there maybe there is one light flashing tell you what's the promble.