Vailant VCW 242EH, Sticking diverter valve?
How can I fix hammer knock in plumbing?
pressure valves?
how do i replace the expansion vessel on vaillint turbomax 242e?
how to get hot water?
hot water flow problem?
No heating but plenty of hot water ?
how to fix problem?
what is the faultcode f25 on a vailant 824ecotec plus?