It appears that the auto feature (D0) is no longer working on my boiler. My rads are taking 45 mins to get warm and the flame is now a lot lower than it used to be. I have tried gradually increasing the kw on partial load. I started using 14kw (have 9 rads) no change, and it only kicked in when I used max 18kw. It's working fine now at that level, but is it OK to leave it at there?
If Vaillant have an auto feature, then it should be working and the boiler should not change how it operates over night I would have thought.
any info and advice gratefully received.
If Vaillant have an auto feature, then it should be working and the boiler should not change how it operates over night I would have thought.
any info and advice gratefully received.