Hi All,
I have had a Baxi 105e instant Combi boiler for over a year now. It has developed a whining noise. This was only really noticable when the heating was running. It would whine every so often for a few minutes then stop.
It now does it when only the hw circuit is switched on. The 105e instant has a small hw tank built in. I think the whining happens when this is being re-heated or filled up. If i turn a hw tap on when the boiler is whining then the noise stops.
The boiler still fires correctly and the heating and hw circuits are working ok.
There was a small leak in the heating circuit last year that took the pressure to about 0.5bar which may have caused some damage.
I initially thought it was the pump but as this is running when I am drawing from a hw tap and there is no noise. But are there any other parts on a boilder that would move for 1-2 minutes at a time that could create this noise? There are only diverter valves but these would only move between heating and hw for a few seconds.
I don't really want to get anyone in at this stage until I know mopre about the cause.
Does anyone have any ideas?
Regards,
Reader