Quote:
Originally Posted by cabmandone
Typically the heat exchanger gets soot buildup and needs cleaned. If the system is venting properly, the silicone is pretty much for looks from my experience. Odds are if you're able to see the burner flame, it'll be lazy and yellow. I didn't do much with boilers but worked on a few for friends. Each time there was a problem I had to take the metal outer panels off where the vent pipe connected to the boiler and vacuum the soot out of the heat exchanger.
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Thanks for the reply Nick. So you are saying if I remove the elbow where the vent connects to the boiler there might be soot built up in there. Here is a picture I should remove the elbow circled, correct?
