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Posted by HeatPro on September 28, 2004 at 10:46:50:
In Reply to: modena 80 e posted by russell on September 28, 2004 at 07:14:14:
The problem could be
A] low water flow rates, which has to do with a blocked tube or circulator problem
B] a bad expansion tank
C] control problem
or a combination of the above. IMO it will not be solved by one part number.