central heating not working on thermostat..

[shambolic]

i haven't read through all of this post, BUT why would pushing the manual lever arm across NOT put on the pump and boiler.

Because (a) it isn't designed to do that, and (b) it isn't constructed to do it.

it is doing the same job as the motor would be doing

No it isn't.

only if the motor has failed and is not moving, then doing it maually temporarily will surely start the PUMP / boiler?

No it won't. And don't call me surely.

Thankyou mate someone who knows what you and I meant