Neutral Axis

Archive for February, 2012

AO Smith Vertex Water Heater Problem

by on Feb.09, 2012, under Uncategorized

[Updated below]
A few weeks ago I noticed that my AO Smith water heater was flashing a fault message on it’s screen. “Flame Detect Error, A9”. The description says this is typically either from a gas valve that isn’t closing or a bad CCB. I don’t know what a CCB is unless is the “control circuit board”. There were 255 of these errors that had been logged. In an 8bit world, 255 is kind of a special number, so I figure that’s all the errors that it can keep track of.

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