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Deleted member 105431
I am an approved installer for Viessmann and can offer a 5 year guarantee on fitting these boilers.
I have been fitting viessman 100 and 200's exclusively for the last 2 and a half years and have fitted over 40, you want a list of the faults?
1. Faulty ignition blocks (giving F4 faults) both gray and black units
2. Faulty PCBs (giving F4 faults)
3. Perforating expansion vessels in less than the 2 year warranty
4. Splitting elbows on aqua blocks causing floods and electrical component damage, Viessman reluctantly admitted that they are now replacing all these at the services!!!
5. Faulty diverter valves, I had 2 go down within 24 hours of fitting them!!
6. Splitting ruber hoses from heat exchanger - floods!!
7. F5 faults on fans, sticking flaps
And most worrying of all!!!
8. Condensate falling onto heatproof pad in main he, causing it to crumble, fall onto burner and crack and split the burner within a year of installation.
I have had a 135% callout for repairs on those in guarantee along with 2 other companies in my area.
Viessmann parts support is virtually non existent, their customer service is appalling, I was told after a brand new boiler failed on the diverter valve that they had none left in the country!!!!
I have found an honest Viessman installer at last. lol. They are nothing special imo, overrated by the trade.