Posted by jtown on January 31, 2000 at 09:31:01:
In Reply to: Enerjet Boiler humming pipes posted by Paula on January 30, 2000 at 19:37:36:
Does it go away once hot? You may have air that is not being vented as well as it used to be or your velocity was marginal and wear of your baseboards is allowing it to show up. Your pump comes on to heat the baseboards, try to see if the noise is actually coming from it.