If the motor still running, the motor should be fine.! L$ K m9 s& @; o9 J
Possible reason:6 l3 C! _5 h; l0 k
Flame sensor, up limit sensor or the pressure differential sensor.( ], ^4 e2 N5 |5 {; B4 ` j, _
Open the control box, there maybe there is one light flashing tell you what's the promble.