Combi Question

[Dan Robinson]

Indeed - it would be nice if daughter could post a video to You Tube of the noise.

Noise descriptions are very ambiguous and open to interpretation. I've been to several houses of forum members looking at problems described on here only to find the descriptions, whilst not inaccurate, was leading the forum down the wrong avenue completely.

 

[snes]

He's still Mr Angry, isn't he? And everyone else is to blame, too.

What happened to you deleting your account?

 

[Doggit]

I suspect you need to get the landlord in to have a look at the boiler. The problem is that because he's not independent, he may consider the boiler to be fine, whereas someone else would query it.

As Bernard says, it could be a vibration problem, but is it only the noise that you're worried about it being in your grand daughters room that's disturbing her, or are there other concerns.

 

[Agile]

One source of a hum could be a mains transformer in the power supply to the control circuits. While a transformer should be silent in operation it is not unknown for them to hum slightly due to the magnetic field inducing vibration in something in or near the transformer. In a bedroom this hum would be far more noticable than in a kitchen.

Have you forgotten Bernard that the mains transformers themselves can hum as well!

Hum in nearby parts is usually mechanically transferred rather than induced by the magnetic field. In most transformers the magnetic field is well contained within the core.

Tony

 

[bernardgreen]

Have you forgotten Bernard that the mains transformers themselves can hum as well!

I said that, or at least inferred it when I said something in the transformer might be vibrating. Loosely packed laminations or a loose bobbin are the most common sources of hum. Loosely laid windings will hum as wires vibrate but the vibration here can abraid the insulation on the wires which results in shorted turns, overheating and early failure of the transformer

 

[AGAS]

Interestingly, a lot of the posts on here have been removed.

probably zambo complaining to the mods but he seems to have issues, but he does not do himself any favours or lacks people skills

 

[snes]

I find his picture a bit scary, especially with Halloween coming up ........