recently i've had a couple of radiators added to my system and a shower.
everything has been running just fine for the past three weeks until last
i was decorating so not paying much attention but did notice that it was
very hot. i turned down the thermastat that's in the dining room several
times thinking surely the radiators must turn off soon.
anyway, it wasn't until later i actually did some testing and realised that
the radiators were actually coming on with the hot water heating and to make
matters worse the hot water heating wasn't stopping unless i switched it off
i.e. the water was definitely hot enough (in fact scalding) but the boiler
was still continuously on.
i've also noticed in the airing cupboard that there's a definite continuous
click click click coming from it.
to recap, the radiators are coming on and extremely hot when i turn the hot
water heating on regardless of any setting that the thermostat in the dining
room is. the hot water is extremely hot. there's a regular clicking sound
coming from the airing cupboard about once every second.
any ideas what's causing this?