I have an old style analogue Honeywell room stat that appears to be stuck at 62 degrees or thereabouts...When switching the central heating on it runs for about 15mins(no more)then switches off leaving the water to get hotter until the point that the tank then overflows!
Would I be right in thinking I need to replace the room stat and possibly the thermostat within the boiler....or is it a little less disastrous than that?
hi, have read this several times and am confused!
you say the room stat brings the boiler on for a while then goes off but water in the TANK? gets hotter,, not sure what system you have but the room stat does not control the hot water, there will be a tank stat unless old gravity hot water set up when the final temp will be controled by the boiler stat.
More info. ref motorised valves/pumps/stats/time clocks etc.
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