lennox series g50uhi knocks when on

10-11-2011, 01:57 PM	#1
sigmang@wowway. Newbie   Join Date: Oct 2011 Posts: 1	lennox series g50uhi knocks when on furnace has a knocking noise but not all the time when heat is on does not happen when a/c is on

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10-11-2011, 02:44 PM	#2
JJboy Member     Join Date: Oct 2010 Location: Austin - Texas Posts: 1,402	lennox series g50uhi knocks when on maybe inducer motor is making the noise. __________________ **Always kill the power ** Hot air rises, but heat will always move from higher to lower temperatures. ** Real man shoot in manual. ** If it ain't grounded, it ain't dead.