Did a no heat call on a Lenox gas furnace. Arriving to the job I heard the inducer motor humming. So I undid the flue pipe and made sure the inducer motor was Spinning freely which it was not due to dust and debris in there. After cleaning that out and making sure the inducer motor was spinning freely the unit started right up and is working properly at this point. M#SL280UH090XV48B-05 s#1718H53931