Recent content by Whitevanman

Fitted new PCB which has sorted it. Thanks for the confirmation. Cost of parts was the same as Vaillants fixed price parts and labour call out. You can't win them all but at least I have a better understanding of how my boiler works.

It's an 837 model, about 6 years old. CH works fine but no hot water. Did the following but now need help. 1) Opened up the front to find diverter valve has a leak 2) Stepper motor seemed to work when switching between HW and CH but action seemed poor and thread was in poor condition. 3)...