If the motor still running, the motor should be fine. 6 p$ o, A4 g& y6 u pPossible reason:0 J/ ~" r# g9 q" P) O- q/ ^" Q
Flame sensor, up limit sensor or the pressure differential sensor.7 r% d4 [* K I
Open the control box, there maybe there is one light flashing tell you what's the promble.