Hi
We have Vaillant Ecotec 824 R1 in our flat which has an issue that puzzles gas engineers. The boiler make a very loud noise when central heating is on - this in random and occurs mostly at night.
I'm sharing video showing the problem via Google Drive.
The engineers are puzzled and so far...
Hi
Our heating is dead and winter is coming...Got a little baby now so need it sorted.
The system is Valliant ecoTEC plus 824 and drayton digistat +3 wired (no batteries; no RF).
The system was turned off for the summer - boiler on OFF (by turning the radiator knob to the left) and digistat...