WARNING VAILLANT 837 commbi boiler

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Well the Op has stated that Vaillant refuse to come to the boiler under warranty but hasnt stated why. There has to be a reason as this simply doesnt happen. In actual fact its amazing what they will go out too, and many times when I worked there I walked out again when installs were clearly an illegal lashup. I suspect vaillant have been out and advised of installation defects and refused to return until they were rectified
 
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I saw his Corgi card in November 2008 and claiming 30 years experience.
The system was cleaned, installation issue ? maybe but I doubt, and I did receive paper work from Vaillant but their customer service is non exsistant and impolite.
Okay, heating engineer, installer, plumber, pipe solderier ? who cares he cannot fix it.
Vaillant are utter rubbish we moved in to the property in 1993 with a Vaillant combi boiler fitted in 1989 again supplying hot water with heating problems so I fitted a Rayburn and opened up all the fireplaces throughout also the neighbour had an identical model fitted at the same time with the same problem.
I kick myself now as I was going to go for a Worcester Bosch but my installer strongly recommended the latest Vaillant stating the teething problems of early Vaillants had been resolved and their technology was far superior to Worcester Bosch, recalling all that I must kick myself again %4$£2!*& that feels better.

It all seemed proper and correct but I am down about £4000, have a boiler giving hot water and its like any profession today its take the money, run and sod the customer.
 
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I have been fitting vaillant boilers since 1986 and are still my first choice boiler.your problem is with the installer.
 
The size is a very large L shaped building being a long stone cottage like 2 semi or 4 terraced with a massive garage and bungalow attached at the end, around 20 radiators.
But this was my first question to the installer, I require more a commercial boiler rather than domestic as the previous Vaillant fitted, when the heating did work, never supplied heating to more than 12 radiators and rightly so due to the kw output, pump and distance, the installer immediately pointed out the 837 stating small hotels use them with its huge kw output and powerful pump.
Today he removed the heat exchanger and flushed out with acid, replaced and on the digital display the radiator symbol remains on but no flame symbol, previous when the system had been turned off for at least 30 mins I would turn the central heating knob to on and the radiator symbol would appear, it would fire up for 8 seconds then stop and go on to ciculating mode with flashing radiator and flashing C, all pipework remains cold, the pump is working.
 
then its just as likely to be a pipe sizing....a 37kw boiler if that is the heat load requires pipes at least in 35mm

But the boiler is only 37kw for hot water, and 28kw for heating I think....
 
Glad to hear you fit vaillant boilers

do they work better than their combo boilers ? :D

There is no reliable combination boiler, take earlier this year when so many condensing boilers did not work due to freezing to a small pipe and are they more efficient ? no its just a sales gimmick but you will use less gas when they do not work.
 
both are equally reliable, but like all boilers they need permament protection with a proper filter
 
your main problem seems to be your inability to listen to what people are telling you. There's nothing wrong with the boiler, its been badly specced and/or installed. Let me know when your getting rid of it and I'll take it away for you free of charge.
 
I have listened and I am now convinced that combi boilers are a concept still in their infancy, with many problems that require far more work in all areas, but regarding the expensive 837 vaillant with its design problems, cheap components, poor construction its no wonder the boiler is faulty from new, it is not repairable and I would only consider scrapping the item and that means I would have at least 30 minutes on it with a suitable sized sledge hammer, possibly my splitter axe on the expansion vessel, and talking of faulty remember Basil when his 1100 Austin Morris kept breaking down he would give it the birch, so I will throw in some of that just for good measure making sure no parts could be used in future by any plumbers.
 

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