I have been a loyal install of Viessmann products now for over 10 years but the last couple of years have been awful, Used to be that you would call in a warranty call and it was usualy like next day, but now wo knows a week., longer, let alone if you can actually get through to them on the phone, I would be very surprised if a lot of installers are not looking else where not
10 months ago
Viessmann Limited has a
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