Not requesting heat: Vaillant HR solide Plus VHR30--34/3-5combi

Bots

Here some pictures of how it is installed:

https://imgur.com/a/t8KX5K2

I’ve tried installing with settings

D01, D05, D06 & D07
HC1 & HC2

Somehow I keep getting error code S30, and the thermostat doesn’t give heat request to the boiler.

If I put the boiler in diagnose/maintenance mode then it does manually send warm water to the radiator.


Anybody an idea in which settings I need to tinker?

Edit: it used to work for over a year, but I recently replaced the circuit board of the boiler after a defect, ever since getting heat doesn’t work for radiators (hot tap water does work)

Thanks!

johnnyp78

Have you checked that model is compatible with Tado ? I think some vaillants aren’t

Bots

Should work, it worked in the past as well, but it stopped working after replacing the circuit board of the boiler.

johnnyp78

That implies to me that there’s a problem with the circuit board.

Bots

Thanks for the prompt replies, but it still worked a couple of months after replacing, looking at my gas bills.

Somewhere in the summer it stopped working, but recently found out as the weather became colder.