If the motor still running, the motor should be fine.' {1 Q0 Z4 T/ y3 k, s5 i
Possible reason:" n& u' t) }. v- b& c4 x1 O8 w
Flame sensor, up limit sensor or the pressure differential sensor.1 d3 ^/ f% S9 u0 p' }, j5 l7 f6 R
Open the control box, there maybe there is one light flashing tell you what's the promble.