If the motor still running, the motor should be fine. 4 O9 O8 G% w7 j) u0 I% j; lPossible reason: / U4 m7 C* O7 W" T$ f1 y+ mFlame sensor, up limit sensor or the pressure differential sensor.. O( Z+ X& R+ t* U- `
Open the control box, there maybe there is one light flashing tell you what's the promble.