White residue on oven burner

[Marc]

Natural gas powered residential oven appliance: Yesterday's inspection revealed a large amount of pure white residue on the oven surfaces that were immediately above the burner. A google search yielded several possibilities, one was aluminum oxide which came from the oxidized interior walls of the aluminum gas line that was feeding the pilot. I don't recall if the main burner was fed by an aluminum line also but the residue does appear to be centralized directly above the pilot.

Can anyone confirm the aluminum oxide theory?

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Marc

[Chad Fabry]

My guess is zinc oxide from the deflector and the burner

[Tim H]

My guess is zinc oxide from the deflector and the burner

Yep, there is likely an area in the center of the oxidation where the plating has worn/burnt through to the base metal. Once that happens, it's on.

Tim