Yes as Paul says it's cobblers.
You pick up the yellow pages and you dont know whether you're going to get someone with near mystic diagnostic skills and the spares in his pocket, or a donkey who wouldn't know how to jump-start a car.
Try to get yourself on to some manufacuter's courses (they're free usually) which will put the stuff you have to learn from book, into context.
The basic Amps Volts Ohms AC DC stuff is (was) covered in school physics, at GCSE / O/ whatever it is now, level. Some of the other physics around that level about pressures and flow comes in handy too.
Wouldn't be a bad start.
There's not much in boilers you'd get involved in which would really be called electronics - it's mostly switches, and following the sequence of things.
I can sympathise if you got the Alan Harris version of what a combi is at Nescot. I think he sees them as a temporary distraction from the important aspects of plumbing - ie lead work!
You pick up the yellow pages and you dont know whether you're going to get someone with near mystic diagnostic skills and the spares in his pocket, or a donkey who wouldn't know how to jump-start a car.
Try to get yourself on to some manufacuter's courses (they're free usually) which will put the stuff you have to learn from book, into context.
The basic Amps Volts Ohms AC DC stuff is (was) covered in school physics, at GCSE / O/ whatever it is now, level. Some of the other physics around that level about pressures and flow comes in handy too.
Wouldn't be a bad start.
There's not much in boilers you'd get involved in which would really be called electronics - it's mostly switches, and following the sequence of things.
I can sympathise if you got the Alan Harris version of what a combi is at Nescot. I think he sees them as a temporary distraction from the important aspects of plumbing - ie lead work!