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Posted by HeatPro on December 05, 2005 at 13:46:35:
In Reply to: Water Heater Burner problem posted by Daniel on December 05, 2005 at 13:35:01:
Might be a:
dirty cad cell,
a bad wire,
a wearing pump seal,
a leak in the line,
some water or sludge in the line,
a dirty flue,
a change in the draft,
in other words, lots of reasons that won't be found by a wish and a guess.
If you get someone in with a vacuum gauge and combustion test instruments you'll get indications of how the unit compares with other burners, then the tech will know what to work toward.
http://www.suntecpumps.com/PDFs/Installation%20and%20Service%20Manual%20-%20Section%20IV.pdf
http://www.websterfuelpumps.com/trouble.htm