If the motor still running, the motor should be fine. % U+ O& _0 ~: Q a: DPossible reason: 4 ? C. ?7 E* V8 o3 FFlame sensor, up limit sensor or the pressure differential sensor. ) I; E* k4 s. z6 j6 T1 ~Open the control box, there maybe there is one light flashing tell you what's the promble.