wrote in message
oups.com...
Oil-fired boiler, every once-in-awhile it spits out huge amounts of
soot, 1st time thought it was a home-grown outside combustion air pipe
that had slipped 1/2 off and blocked the intakes, because when I took
that off, it ran fine.

A month after that (monday), it did it again, called the service guys.
They said the electrodes were too far apart, was causing late ignition,
and that it wouldn't burn properly bacause of that.

SNIP

The electrodes being too far apart have nothing to do with the way it burns.
Yes, you can get late ignition, but if it's sooted up, there IS something
wrong with the air mixture. Sounds like you need to find a different company
that fix it properly if these guys don't.....