I have Ecotec Plus 837 combi boiler. Few days ago I noticed that when
I open multiple taps, the boiler starts to make slight noise.
Everything is quiet when CH is on or with just one tap open.
I removed the cover to localise the noise and I suspect it's coming
from the fan. To me it sounds like it's out of balance, kind of like
washing machine when not properly leveled. Not very loud though - just
doesn't sound like normal operation.
I have entered diagnostic mode to display fan speed and indeed - noise
starts when revs > 380 rpm. I have entered second diagnostic mode and
offset maximum fan speed from factory -26 to -100 (lowest value). That
improved it slightly, but not 100%.
Is this behaviour common or does boiler need attention ? Is there
anything I can further do or check ?
hope someone can shed some light ...
- posted 12 years ago