Posted by jtown on October 08, 2001 at 20:29:03:
In Reply to: Re: repost: Pilot and venting posted by Scottj on October 08, 2001 at 15:53:18:
Triple wall SS pipe is all fuel good for oil/wood/coal and gas, just overkill from galvanized double wall B type for gas. You say flame stays good (up til blr cough?) and then say it can diminish. If the boiler stays steady and the pilot dies down and then up, it sounds like it has to be in the gas control on the water heater. Is there teflon tape, or excess pipe dope, on the pipe into it? Tape a sheet of paper in front of the air inlet to the wtr htr, leaving air gap (DO NOT LEAVE WITH IT THERE) and see if it moves when you cause the boiler to 'cough'. If there isn't enough air movement in the space (big basement?), I'd look hard at the wtr htr control. It is about all that there is. I assume you have a new (maybe good) thermocouple on the wtr htr. Remember to look carefully, knowing that you may have two things wrong.