My boiler makes a very loud humming noise, occasionally. Trying to work out what it might be so I can speak to the boiler service man about it.
Only happens when the hot water tap is turned on. Unlikely to happen if the heating is off. When the heating is on (or recently on and the boiler is hot), opening the hot water tap to about 50% sometimes causes the boiler to make a very loud humming noise for as long as the tap is on. Shut the tap and the noise goes, ending with a woomphf sort of noise. Open the tap 100% and no noise happens, it's only at partial flows.
I can't get a recording of it, never happens when I want it to. Sounds exactly the same as the short noise in this video at 5 seconds to 8 seconds, but the noise will carry on for as long as the hot tap is open.
Is it the gas valve like the video says?
Is it causing damage to anything?
What causes it?
Why is it related to the boiler being hot or not? I initially thought it was kettling but having listened to lots of kettling on youtube I don't think it is. It's exactly like in that video.
Any idea of cost to fix? Unica 32HE.
Thank you.
Only happens when the hot water tap is turned on. Unlikely to happen if the heating is off. When the heating is on (or recently on and the boiler is hot), opening the hot water tap to about 50% sometimes causes the boiler to make a very loud humming noise for as long as the tap is on. Shut the tap and the noise goes, ending with a woomphf sort of noise. Open the tap 100% and no noise happens, it's only at partial flows.
I can't get a recording of it, never happens when I want it to. Sounds exactly the same as the short noise in this video at 5 seconds to 8 seconds, but the noise will carry on for as long as the hot tap is open.
Is it the gas valve like the video says?
Is it causing damage to anything?
What causes it?
Why is it related to the boiler being hot or not? I initially thought it was kettling but having listened to lots of kettling on youtube I don't think it is. It's exactly like in that video.
Any idea of cost to fix? Unica 32HE.
Thank you.
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