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.