No Central Heating Vaillant 838 Eco Tec

[toucanpotter]

Hi All, we can get hot water from the above boiler, but no central heating since the temperature dropped a couple of days ago. We’ve bled the radiators and have no fault codes on the boiler - any checks or simple fixes you can suggest?

 

[SpecialK]

When you tell it to heat is there a radiator symbol on the screen?

 

[toucanpotter]

Yes, we get a radiator symbol, and a status code S07 - diverter valve issue?