In message , Andrew Gabriel
writes

It has to be approved by Potterton if it is to be put in one of their
appliances

or the board manufacturer gets it GC approved themself. That might
be hard without Potterton's cooperation though.

Well yes

Especially when there's a microcontroller with a program in

so there are secondary functions (such as kicking the pump every day (as
an anti seizing measure), rate tables etc)

It's not difficult for Potterton to argue that the pcb is not compliant
with their boiler, even if it performs the primary functions


--
geoff