Worcester vs Vaillant vs Gloworm...

[spile]

How were Vaillant about the issue? Did they give the usual 'the boiler was at the end of its life, despite the same boiler lasting nearly twice as long in Germany?'

Could it have been an installer issue?

The Worcester 8000 seems to have a 12 year guarantee, though only if you take their filter and pay another £40.

Fine until the warranty ran out and because of numerous issues they gave me an extra year. Numerous pressure sensors, diverter valves and a new heat exchanger. System was flushed and inhibitor present but made no difference. Been running for 12 months with no issues so keeping fingers crossed.
No evidence of an installer issue (all warranty work carried out by Vaillant) and I subsequently found it affected a number of Vaillants across this period.

 

[Johntheo5]

I know somebody (UK) that has a ~ 2 year old ecoTEC 630 which has a very, IMO, useful feature, in that it can control the circ pump speed to give a settable (flow/return) dT of 10C to 20C., unfortunately this does not work on this boiler, Vaillant Technical couldn't really offer any fix, except, finally, to say that the boiler was working as it should. It would be interesting if anyone is using this feature and can post a comment, (new thread maybe?)

 

[Madrab]

TBH a boiler can sometimes be only as good as the installer.

Most modern boilers will run happily, without issues, if they are installed properly, looked after regularly and are connected to a system that is in good condition, maintained properly, setup properly and run correctly.

Trouble is though, component failure can often be the weak point and that comes down to manufacturing quality control and out sourcing with a lot of these still coming from the seemingly still favourite Asian suppliers who's quality control can sometimes be sadly lacking. That means you can have 2 of exactly the same boiler and one fails because of components that weren't quite right at the time and the other ticks along quite happily for 15yrs without a hiccup. Unfortunately sometimes there is no logic to it these days.