If the motor still running, the motor should be fine. ; X4 D$ J, S, K2 o% CPossible reason: 5 S4 B3 }# Q) b$ T6 _- R. bFlame sensor, up limit sensor or the pressure differential sensor.4 E# I+ B, Q a6 E' u1 u
Open the control box, there maybe there is one light flashing tell you what's the promble.