My non-condensing boiler (vaillant) makes a squelching / kettling / air bubbling sound when its running the stay-warm feature (for quicker hot water etc). However it does not make this sound at all when heating water or the central heating. Anyone know what it could be ? Cheers, Simon.
I have never used the stay warm feature on mine seems like a waste of energy/money
Is it an always on or timed feature (mine would be always on) ?
sounds like it is operating for far too long and boiling the still water in the manifold.
Ah, well it is on for what seems like a long time. Maybe a sensor is faulty. I'll see if the noise starts after a short while or straight away. Simon.
I think it can be timed. I fact I thought it was, but the feature seems to be running all night now (every hour or so it comes on). Maybe I need to look at the programme. Simon.
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