first of all, what is this thing here with the dials and numbers, and can it be replaced? It's making a really LOUD buzzing noise when on, doesn't stop, and I can hear it from outside it's so loud. Everything works otherwise.

Second, is it normal to see flames shoot out the front of the boiler like this? Can that be easily fixed if not? Thanks!

pic:

video:
https://www.youtube.com/watch?v=zJPV...ature=youtu.be

 

It appears to be your water temperature high limit control and possibly also runs the circulator.

Yes, something can be found to replace it I'm sure, but I'm doubtful that you'll find an exact repalcement. Looks fairly senior...

NO! It is absolutely NOT NORMAL! In fact it is VERY DANGEROUS!

SHUT IT OFF! You don't want to burn the house down, do you?

The boiler needs to be inspected by a person that knows what to look for and how to correct it. I think in this case it means a technician needs to be called.

When flames 'roll out' of a boiler it means that the flue gas passages in the boiler are plugged up with rust and debris, OR the flue pipe and/or chimney are plugged up.

If you continue to run that boiler, in addition to FIRE HAZARD you also run the risk of carbon monoxide poisoning and BEING KILLED!



Please discontinue the use of that appliance NOW!

 

Photog, please post another video concentrating on the burners.