Jayco Greyhawk 2015, Manual

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SECTION 9 – HEATING & COOLING CLASS C MOTORHOME
9-2
A qualified RV technician should perform all furnace maintenance at least once a
year (more often depending on furnace usage). Never attempt to repair the
furnace yourself
.
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.
WARNING
To ensure your personal safety, do not obstruct or alter the furnace in any
manner. Do not install screens over the vent for any reason. Screens will
become restricted and cause unsafe furnace operation. For your safety, only
the manufacturer’s factory authorized parts should be used on your furnace.