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Thanks Harold5 Anybody know how I check this on a Eco Tec 831? Have also wondered if I need to bleed the boiler (ie the pump, but dont know how?) Cheers

BUMP

Quick Update :- I have just restored power to boiler and we now have hot water. So I just need to get the central heating working. I have turned the thermostat down for the time being so it doesnt work too hard trying to pump water around the system. But any advise on this one...

Thanks for your quick response Lightning. Sorry - what is aav? Cheers

Thanks Guys for all your advice. Anyway, today I firstly fitted the TF1, and that went smoothly, I then fitted the new diverter valve, and that is where my problems started: When I turned it back on the hot water was working, but it would not heat the central heating system - the CH...

Thanks again Mickyg. I have read somewhere else - that if I am not going to powerflush the best chemical to put in and leave in for a bit is Sentinel x400, and then empty out and then put in x100. Would that be your recommendation? I am currently looking into your filter...

Thanks Mickyg - I still need to do what lightning said tho don't I? (i.e fit, and then powerflush?) Update - The new diverter has arrived, so any tips on how to swap out would be highly appreciated?

Thanks lightning. Really Appreciate your advise. Have part on order currently, have you any recommendation as to the best steps as to approaching the task of removal and replacement of the part? Once again - Thank you.

Anyone able to advise at all?

Well its actually still working at the moment, as the leak is quite small. So what would you recommend (i.e - power flush, and then change diverter)?

That's cool - I must have been unlucky then. Anyway, we cant afford to replace or get someone to look at it again at moment as we have a new baby, so any advise on our current problem would be apreciated.

None of them were related in fact. When under warranty we had on two occasions one of the rubber pipes burst which took out the PCB, and on the 2nd occasion they decided to change the boiler as it had done some other damage. We then had further issues once changed which was also under...

Hi All, I have a Vaillant 831 eco tec plus (which has been nothing but problems since being installed 5 years ago). Anyway - the newest problem I have was initially the pressure kept dropping on the boiler, and I have just recently seen that the diverter valve is leaking. My question is - I...