Napoleon Grills PRO 450 manual During operation Ports are clogged

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Problem	Possible Causes	Solution
Burner output on “high”	Lack of gas.	Check gas level in propane cylinder.
setting is too low.
(Rumbling noise and	Supply hose is pinched.	Reposition supply hose as necessary.
fluttering blue flame at
burner surface.)	Dirty or clogged orifice.	Clean burner orifice.
	Spider webs or other matter in	Clean out venturi tube.
	venturi tube.
	Propane regulator in “low flow”	Ensure lighting procedure is followed carefully. All gas
	state.	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.
Infrared burner (if	Ceramic tiles overloaded with	Turn burner off and allow to cool for at least two
equipped) flashes back	grease drippings and build-up.	minutes. Relight burner and burn on high for at least five
(during operation the	Ports are clogged.	minutes or until the ceramic tiles are evenly glowing red.
burner abruptly makes
a loud “whoosh” sound,
followed by a continuous
blow-torch type sound	Burner overheated due to	Ensure that no more than 75% of the grill surface is
and grows dim.)	inadequate ventilation (too much	covered by objects or accessories. Turn burner off and
	grill surface covered by griddle	allow to cool for at least two minutes, then relight.
	or pan.)
	Cracked ceramic tile.	Allow burner to cool and inspect very closely for
		cracks. If any cracks are found, contact your authorized
		Napoleon dealer to order a replacement burner
		assembly.
	Leaking gasket surrounding the	Contact your authorized Napoleon dealer for instructions
	ceramic tile, or a weld failure in	on ordering a replacement burner assembly.
	the burner housing.
Pilot will not light.	Lack of gas.	After turning pilot knob to high, wait approximately
(if equipped)		20-30 seconds for air to purge the gas supply line while
		pressing igniter. Fill propane cylinder. During initial set-
		up or after tank has been refilled, it is best to light one
		of the tube burners before lighting the pilot burner. This
		enables the gas to reach the valves on the manifold more
		quickly.
	Obstruction in pilot orifice.	Clean pilot orifice.
	Electrode wire loose or off.	Replace lead wire.
	Dirty pilot electrode.	Clean pilot electrode.
	Pilot is actually lit.	The pilot flame, especially on natural gas units is very
		difficult to see. Place your hand 1 in. (2.5 cm) above grill
		surface over the pilot burner to feel for heat.

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