My daughter's complained about her heating/hot water pump making a 'funny noise'.
She seems to have one of these systems installed in her 3-storey town house: tinyurl.com/y6vzmxs2
The boiler's on the ground floor and this hot water cylinder's on the top floor.
It sounds like cavitation to me, but when I've opened the bleed valve above the pump (with the system off) nothing comes out. There is pressure in the system.
I guess I've got to poke something down the bleed valve hole as it's blocked?
Another problem, is that with the heating set to off and the hot water set to off, the boiler occasionally fires and the pump's running continuously. It seems as if the system's pumping hot water around continuously in expectation of a demand, although both valves (heat and hot water) are closed. Is this normal for this type of system?
She hasn't a manual for the programmer.
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