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I have a Worcester Bosch 24i boiler. It is fitted with the standard facia mounted 24 hour clockwork programmer and also a simple hard wired analogue room thermostat. I would like to be able to programme the heating over a 7 day cycle as I am often not at home for several days a week. Is...

Last year I had our oil fired central heating boiler replaced with a Grant outdoor type. As it lives outdoors this boiler has a built in froststat to protect it in cold conditions. I suppose Grant err on the safe side & I found that the boiler ran whenever it was about 5deg C or colder - last...