On 08/11/2017 15:31, fred wrote:

Hot water, as heated by the central heating is ferociously hot, There
is some type of adjustable wired thermostat clipped on to one of the
pipes entering the hot water cylinder but fiddling with this has no
effect.

Is this a job for a plumber or an electrician ?

Plumber probably, however it should be an easy DIY fix.

If you work out what type of system you have:

http://wiki.diyfaq.org.uk/index.php/...ols_and_Zoning

you should be able to trace through what is going on...


--
Cheers,

John.

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