Yes and the C is on to say that it is set for instant hot water.
When moving the dials the target temp changes but the screen still goes back to 0 degrees
Hopefully you wonderful people can help. :)
We have a Vaillant and since it was left turned off overnight we now have no hot water or heating.
There are no fault codes, the pressure is fine but the screen shows 0 degrees c. When pressing I it shows s.0 (no heat required).
Turning a hot...