Christian McArdle wrote:
Set the timer to be on 24 hours a day. Replace your room thermostat with a
programmable type. Then it doesn't matter that your clock is knackered, and
you have the heating controls in the lounge, where they belong and all the
advantages of a programmable thermostat, such as selecting a specific
temperatures for different times of day.

This presumes that the same fault doesn't prevent the 24h option from
working.

Do you mean a wall hung thermostat? The only thermostat I have is one on
one of my rads (in my lounge). I don't think I have some master
thermostat. There is a control on the boiler which seems to make the
boiler turn on more often, but none that stops it turning on at all.

It works fine when it's manually switched on.

Thanks a lot,
Dan