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View the thread, titled "Vaillant 630 on demand raidiator heating not working" which is posted in Gaining Plumbing Experience on UK Plumbers Forums.

T

tinjanurtle

I have a Vailant 630 Boiler and its connected to both hot water cylinder and radiator.

It seems to work sporadically but the hot water is always working properly, the radiators heat-up randomly and i can't work out a pattern when they are working. I need for them to work on demand as its getting colder. ( it almost seems when the hot water is being used the raiditor works but that could be a guess😕😕)

The status message on the boiler when I press the (i) button is S30, in the manual this means no demand... but i have the wireless thermostat turned up full. It seems like the boiler is not getting the instruction of that the radiator on-demand is turned off.

If i press the - and the + together the raidiators heat up but only for a short while..😕.

Does anyone know how to turn this on?

I have had the heating company in a few times just for it to keep resetting after some power dips or mains outages which happen form time to time.

I would be truly grateful if someone could point me in the right direction please,

Kind regards,

R
 

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