If the motor still running, the motor should be fine.! X/ b/ X V5 I& G7 }! r( d
Possible reason:2 I3 L! e( K1 ?" C8 l0 c8 h; F+ W8 f
Flame sensor, up limit sensor or the pressure differential sensor.1 t6 c1 H; S( v; h. f0 w9 T6 {& F- j
Open the control box, there maybe there is one light flashing tell you what's the promble.