Recent content by iloatheboilers

Thanks mysteryman - it eventually came out but it was far from easy... New part in and working fine (at the moment). As an aside, while the cover was off I noticed that the ignition unit is one of the turquoise type that are spoken poorly of in other posts. Given the low cost and ease I'm...

Hope someone out there can help. Having some trouble with a Viessmann (Vitodens 100 - WB1A) in that it doesn't do HW... When demanded, it duly fires up and gives the tap symbol, but then begins to heat the CH circuit. We've come to the conclusion that it's the diverter valve and are in the...