Just wondering what the Vaillant guys think of the current 837 model are they a vast improvement on the early models, I believe from what I've read they had quite a few issues, I've been recommended this by 3 installers I've spoken. To this week? Thanks.
Good boilers although why change something that ain't broke , MK1 was a better boiler in my opinion and software could be tweaked unlike the new model.
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