Best Of

That’s a lot of unrelated perceived value you received. Flushed both sides being? Fire and Watersides of the heat exchanger or supply and return. No mention of condensate trap. 6 years of nat. Gas burning : poorly tuned could be a dirty heat exchanger.

I have found genuinely bad HTP boards. All else should be proven good. Assuming a bad board is different than witnessing / identifying evidence of a board fault. Assuming is flailing. It’s doing something because you don’t know what else to do. 15 tries to ignite and then it does and has a fairly close to good mixture burn would have me looking at the gas valve. Does it receive proper voltage and current during the cycle. Does it actually open with gas flowing when it doesn’t ignite? Looking inside at the burner around year 6 isn’t a bad idea. Cleaning the fire side heat exchanger before it clogs is good. Look for good insulation and a clean normal burner. Maybe there’s a small leak that fouls things and 15 tries dries it out enough to ignite. Is there actually a spark happening where it should? A good tech will be able to conclusively answer these questions.

comcast were pioneers in evaluating representatives in such a way that they are discouraged from solving your problem but everyone does it now.

Their strategy to keep customer support costs down is working.