Any help gratefully received. Our boiler fired up, but CH cut out after about 45 mins, HW fine. Only way to get it to start again was to turn off mains and restart. We called out a plumber, he had a look, called Biasi and decided we needed new PCB, he came to fit it today, turned on boiler, HW fine but now no CH at all. He has no idea, so I have to call a Biasi plumber. In the meantime, anyone any ideas?
Thanks
Thanks