the cylinder and stat were not changed, it had a new pump, valve and boiler, everything else is existing...
the one thing I have read is that these boilers have a pump wiring connector directly to the PCB on the boiler, this is not fitted on this one, also the wiring diagram for the boiler...
Got a customer called me out to a problem with a boiler (above boiler) It was installed before christmas by a gas safe plumber, and he from what I understand copied the wiring from the old boiler assuming it would work, it doesn't. He said to them that he would send over an electrician to sort...