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Posted by HeatPro on January 03, 2005 at 12:20:21:
In Reply to: Trianco Heatmaker - Model 130HWNAT posted by David on January 03, 2005 at 10:07:27:
Their documents are here.
http://www.laars.com/manuals.htm
Could be something as simple as dumping water from the relief due to a bubble.