Just in case anybody’s still interested… the plumber who fitted this new boiler a bit over a year ago is one of those guys who’s been around forever, done all my parents’ work at what I consider to be questionable expense, and of course they trust him completely.
I don’t. So what happened here was that he came round, said their boiler was close to its first annual service anyway, and proceeded to take it to bits. Now bear in mind I know nothing about heating systems here, so just reporting what I saw… far as I can remember, he took a big cover off, and removed a series of big steel plates (baffles?), all of which were covered in soot.
He said the soot was what was preventing the boiler from firing, and cleaned it all off. He fired the burner up a couple of times (while it was detached), giving a big jet of yellow flame.
Now I may not know about boilers, but I know a fair bit about car and motorbike engines, and also remember my Bunsen burner days at school, and to my naïve way of thinking, you only get yellow flames and soot when something’s running too rich (too much fuel, or not enough air). I kind of muttered something to this effect, and he said yes, that’s right, it must have drifted off its ideal setting over the year it’s been in service.
I suspect he didn’t bother his arse setting it up right when he installed it, but this may just reflect the fact that I simply don’t trust the guy. So two questions, if you’ll indulge me please:
1. Would you normally expect the burner flame to be yellow? Not blue…?
2. How likely is it that it was set up correctly, and “drifted” to a too-rich state?
One of the reasons I ask is that he also fitted a new boiler for me (same model) a year ago, so it’s due a service – if he’s dodgy, I need to find somebody else!
Thanks