WARNING
The furnace should be inspected periodically (monthly during the heating season) for
presence of soot on the vent. Soot is formed whenever combustion is incomplete. This
is a visual warning that the furnace is operating in an unsafe manner. If soot is observed
on the vent, immediately shut the furnace OFF and contact a qualified service agency.
Operating the furnace under this condition could lead to serious property damage,
personal injury or loss of life.
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