Wow! look at that - flames, wires, complicated-looking machinery. You
So, er, what exactly is going on here, I hear you not having the temerity to ask.
Well first off we have a boiler that appears to be a version of a Potterton "Profile" that's been installed in the World Through The Looking Glass, because ones in our world look like this:
(Note the big round grey knob is on the right hand side at the bottom.)
And in this Looking Glass World what is our highly skilled and intelligent engineer (not "male model", purleeeease!) actually doing? He appears to be using some sort of electrical meter to measure something - could be voltage, current, insulation or continuity - between a point on the metalwork of the boiler and somewhere we can't see, out of the picture. Given that boilers bring together a potentially-lethal combination of electricity and water, checking that the boiler is safely connected to electrical mains earth is a reasonable thing to do so let's say our engineer is checking earth continuity. Fairy nuff.
So what about the flames? Why would any engineer in their right mind be running the boiler with the covers off (having quite possibly had to jerry-rig a safety device to do so) and then doing a completely unrelated test? And why, if the boiler is running with such unhealthily-yellow flames rather than mostly blue flames indicating proper combustion, isn't he doing anything about that?!
Or could it be - perish the thought! - that the whole thing's been set up to look impressive to a lay public in order to baffle them with science (or, at least, technology) into thinking they couldn't understand something that's about as complicated as a washing machine - which I know you don't know how it works but you know it's not rocket-science - and just cough up a load of money to a mega corporation which has not always been noted for its ability to deliver what its advertisements promise.
