If the motor still running, the motor should be fine.; O* L+ X- ]/ a- w# e; q0 ~
Possible reason:' h2 Z, X( |( r+ U1 V) ?( X; Z
Flame sensor, up limit sensor or the pressure differential sensor.6 c; r& P. e- L1 X
Open the control box, there maybe there is one light flashing tell you what's the promble.