If the motor still running, the motor should be fine. ; L) A9 _' q- m& M: a8 h& q& ^! bPossible reason: . Z# a$ A% c' G. y7 m8 m" r0 CFlame sensor, up limit sensor or the pressure differential sensor.# H3 o; D: K6 C# O, K: G
Open the control box, there maybe there is one light flashing tell you what's the promble.