Boiler stopped working one day after installation. There was subsequently poor co-ordination between installation company and Viessmann, with each blaming each other. Two Viessman engineers inspected boiler, identified fault and provided replacement part but refused to install or fix. I was left without working boiler for nearly a week after installation. Issues like this should be handled behind closed doors - customers should not have to mediate between companies.
3 months ago
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Viessmann Limited has a 4.49 average rating from 735 reviews

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