Troubleshooting - Napoleon PRESTIGE 450 Instruction Manual

10
the burner installed. Do not flex the drill bit when drilling the ports, as this will cause the drill bit to break. This
drill is for burner ports only, not for the brass orifices (jets) which regulate the flow into the burner. Take care
not to enlarge the holes. Ensure the insect screen is clean, tight, and free of any lint or other debris.
Reinstallation: Reverse the procedure to reinstall the burner. Check that the valve enters the burner when
installing. Replace sear plate mount and tighten screws to complete reinstallation.
WARNING!
important that the valve/orifice enters the burner tube before lighting your
gas grill. If the valve is not inside the burner tube a fire or explosion could
occur.
WARNING!
exist, do not use the gas grill. Have the part replaced by your Napoleon Gas Grill dealer or qualified gas
installer.
Aluminum Castings: Clean castings periodically with warm soapy water. Aluminum will not rust, but high
temperatures and weathering can cause oxidation to occur on aluminum surfaces. This appears as white spots
on the castings. To refinish these areas, clean first and sand lightly with fine sandpaper. Wipe the surface to
remove any residue and paint with high temperature barbecue paint. Protect surrounding areas from over-
spray. Follow the manufacture's directions for curing.
Problem
Low heat / Low flame when
valve turned to high.
Excessive flare-ups/uneven
heat.
Burners burn with yellow
flame, accompanied by the
smell of gas.
Flames lift away from
burner, accompanied
by the smell of gas, and
possibly difficulties in
lighting.
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When reinstalling the burner after cleaning it is very
Hose: Check for abrasions, melting, cuts, and cracks in the hose. If any of these conditions

Troubleshooting

Possible Causes
For propane - improper lighting procedure.
For natural gas - undersized supply line.
For both gases - improper preheating.
Sear plates installed incorrectly.
Improper preheating.
Excessive grease and ash build on sear
plates and in drip pan.
Possible spider web or other debris, or
improper air shutter adjustment.
Improper air shutter adjustment.
Solution
Ensure lighting procedure is followed carefully. All
gas grill valves must be in the off position when the
tank valve is turned on. Turn tank on slowly to allow
pressure to equalize. See lighting instructions.
Pipe must be sized according to installation code.
Preheat grill with both main burners on high for 10
to 15 minutes.
Ensure sear plates are installed with the holes
towards the front and the slots on the bottom. See
assembly instructions.
Preheat grill with both main burners on high for 10
to 15 minutes.
Clean sear plates and drip pan regularly. Do not
line pan with aluminum foil. Refer to cleaning
instructions.
Thoroughly clean burner by removing. See general
maintenance instructions. Open air shutter
slightly according to combustion air adjustment
instructions. (This must be done by a qualified gas
installer.)
Close air shutter slightly according to combustion air
adjustment instructions. (This must be done by a
qualified gas installer.)