My boiler moans every so often and even though I've had the (very expensive) Viessmann engineers in twice, they can't fix it.
The moaning is more often in winter (when the heating is on?) but even in summer, it happens every couple of hours. The moaning lasts about 15 seconds on each occasion and is loud enough to be very disconcerting and bothers the neighbours.
Apart from the moaning, the boiler works very well.
Has anyone heard of this type of problem and can suggest a solution?
The moaning is more often in winter (when the heating is on?) but even in summer, it happens every couple of hours. The moaning lasts about 15 seconds on each occasion and is loud enough to be very disconcerting and bothers the neighbours.
Apart from the moaning, the boiler works very well.
Has anyone heard of this type of problem and can suggest a solution?