If the motor still running, the motor should be fine. / ^; O9 O5 c# S8 L" \, h* P( fPossible reason:9 U. T! p7 t& x7 n4 \% k
Flame sensor, up limit sensor or the pressure differential sensor.; f w: A- W- @+ Y N5 @1 ~
Open the control box, there maybe there is one light flashing tell you what's the promble.