vitodens 100w

  1. M

    Boiler adding air into system when hot?

    I previously made a post here about low heat output of the boiler - this has been mostly rectified with a balance however two radiators still only get hot at the top and not at the bottom. Edit: Forgot to mention the boiler is a 26kW Viessmann Vitodens 100-W WB1B :) When the heating/hot...
  2. L

    Installing open vent Vitodens Compact on sealed system

    Hello, I’ve bought a Vitodens WB1B316 Compact Heat Only Boiler, part no. 7416307, for use on an sealed system, replacing a 17 years old Baxi Potterton Promax 24HE. I'm trying to understand what do I need to get exactly for the Vitodens to work in a sealed system, as I'm supplying all the parts...
  3. S

    Dual Channel (hot water and heating) Hive to Combi - Vitodens 100-w - Viessmann

    Hi all, I have Vitodens 100-w and its combi boiler. But, I have got hot water and heating version of hive. Main supply lines were coming directly to old thermostat and then were going to boiler main supply, I have kept it same in the diagram below. Please guide: Where to connect 1 and L from...
  4. J

    Boiler Temp Very Low - No Heating Or Hot Water

    I'm completely unexperienced with all of this, but am hoping for some help here before I have to call someone out.. I have a Viessmann Vitodens 100-W WB1B boiler (pictured) which, as of last night, has dropped to a temperature of between 11 and 13 degrees, leaving me without heating or hot...
  5. Goo2088

    Viessmann vitodens 100 W

    Hi We recently bought a house with a 5 year old viessmann vitodens gas boiler. We have never really got to grips with it... the manual timer doesn't seem to work and we have to manually turn the heating/hot water on and off using the dials. Last winter we had the hot water set at the factory...
  6. I

    Viessmann Vitodens 100 Combi Issue

    I have a 4 year old Viessmann Vitodens 100 Combi boiler feeding an unvented hot water system and underfloor heating system. My issue is with the hot water circuit. When the hot water system switches on in the morning and the boiler fires up there is distinct rattle/judder which lasts a second...
  7. C

    Boiler Issue....help needed

    Our boiler has developed a mind of it's own over the past week that I suspect is an issue with the programming unit but my limited diagnostic skills (turn off/on and reseting) have not resolved the problem. The boiler is a vitodens 100W running off LPG with a drayton tempus 7 programming unit...
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