Recent content by diypj

Thanks for all your help. The boiler is HE30. The diverter is marked as CP type. The alternative replacement is Wilo. Is Honeywell diverter compatible with Isar HE30?

My boiler is 3 years old. From long time ago it developed an annoying problem that when you turn on hot water while central heating is on, you get a big bang from the boiler, you can see the pressure gauge oscillating a lot when this happens. The boiler works perfectly for 3 years now but this...