If the motor still running, the motor should be fine. , U# c9 Z( b" P& N' J' j2 h0 L' nPossible reason:/ ?( {; f6 J. w) p) w: p( {* t& [) u# g- H
Flame sensor, up limit sensor or the pressure differential sensor.* v. W, ^+ U% R. @: S: \; U7 L- g
Open the control box, there maybe there is one light flashing tell you what's the promble.