I have so many things that need doing yesterday in my new house and I
had hoped to avoid doing anything to the central heating this year,
but I don't think its going to work out like that.I have never owned a
central heating system before so its a bit of a black box.

The system is 20+ years old and will be replaced in the next year or
so. It is oil fired and has microbore piping.

There are devices on each radiator which control the temperature to
that radiator. How do thay do that? There is a pipe leading to the
device, then to the radiator and then another pipe leading from the
radiator onwards, so it can't be by flow control or the next radiator
down the line would be controlled too.

One of these devices doesn't work, so one radiator is at full blast
the whole time and thats in the guest bedroom so wasteful. Presumably
I need to replace the device? What is it called and does replacing it
mean draining down the whole system? Is that worth doing at all
considering that the weather is going to get warmer and the heating
will be turned off in a month or two.

Anna
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~~ Anna Kettle, Suffolk, England
|""""| ~ Lime plasterwork, plaster conservation
/ ^^ \ // Freehand modelling and pargeting
|____| www.kettlenet.co.uk 07976 649862