Homeowners Professionals

After Sales Support for Installers & Professionals

With our comprehensive after sales support, we are here to help. Should you require support with your Viessmann heating system, we are always able to provide it.

At Viessmann, we are constantly striving to offer a world class service in every area and draw on our experience gained over 100 years to do this. We work tirelessly to support our heating installations across all fuel types and applications, responding to the needs of our customers nationwide. However, should a problem develop with a Viessmann product, then the re-assurance you have is that we are here to help.  

To assist you in installing, servicing and maintaining our products, technical guides, installation instructions and operating instructions are available to download in PDF format from our online database.

Technical helpline

Viessmann Customer Service Team

Our Customer Service team is here to help you get the best from your Viessmann product throughout its lifetime. Whatever your enquiry, simply call one of our specialist advisors in Telford, email us, or book a visit from a Viessmann Service Engineer if you'd like someone to come to you.

We are here to help you get the most out of your Viessmann system throughout its lifecycle.

Boiler Service Checklist

This service checklist below meets industry agreed best practise as outlined in the Heating & Hotwater Industry Council Gas Boiler Servicing guide.

Check operation of the boiler and controls before service begins to ensure safe operation.
Check condensate siphon/drain and clean.
Electrical safety test and tightness of electrical connections at appliance.
Check expansion vessel and system pressure. If necessary repressurise.
Burner removed and heat exchanger cleaned.
DHW flow rate check.
Check burner gaskets and general condition.
Carry out gas safety checks to ensure the boiler is operating to specification.
Check condition of Ignition and Ionisation electrodes.
Flue gas emissions test.
How can we help?