If the motor still running, the motor should be fine.# H6 z: m0 X2 B1 Q9 t$ r" @
Possible reason:$ [* R5 y9 m, |; k G/ z/ F
Flame sensor, up limit sensor or the pressure differential sensor.5 i$ S, |: b- w4 x/ N8 B" F
Open the control box, there maybe there is one light flashing tell you what's the promble.