Replace leaking vaillant eco tec pro diverter valve cartridge - 0020020015 dripping boiler heating

pliers can be found on ebay - just type "vaillant diverter valve pliers" or "vaillant diverter removal tool". Similar kit found on buycombi.com (both work well)
Some kits come with a new cartridge... always check you're buying the right replacement.... if in doubt call vaillant and ask for a part number.
If your leak is from the housing then the whole housing will need to be replaced... but more often than not it's the cartridge in my experience. replacing the housing is a bigger job and I'll post a video when I get round to it.
prices given are just in my experience.... and vary depending upon area of the country/person doing the repair.
Always "lube it up" - a bit of lube makes life easier.... (insert joke here...)
Video posted in good faith and intended to help people - this is the way I do it, others will have different methods. As long as it works then who cares... constuctive criticism is always welcome - keyboard warriors not so much.

[@orhan2674]

Thank you very much for this useful sharing.

[@pabt02]

Thank you!

[@MSKChess]

I've done a couple of these in the last few months, it must be an issue with these as you say Pete.

[@petegasguy]

Just to annoy you mate 😂 I always isolate the lot whenever i’m doing anything inside. You never been to a knackered old thing and struggled removing a part? Ever had to change what you’re doing and had to take out an extra bit? Force of habit - isolate the lot then there are no nasty surprises should you disturb anything else. Just my thoughts…

[@MSKChess]

@@petegasguy lol, I've broke low water pressure switches off with the thread still in the housing, lost clips down the back of kitchen units, broke electrodes trying to straighten them, it took me ages to learn if it ain't broken don't go near it.

[@petegasguy]

^what he said!!