If the motor still running, the motor should be fine. & u) p3 R' l( G5 m& `. [5 z0 xPossible reason:1 G3 C# k z7 j( D& v& E
Flame sensor, up limit sensor or the pressure differential sensor.* O' V! ?$ N' L0 U* N( O
Open the control box, there maybe there is one light flashing tell you what's the promble.