UK Plumber Forum

[The chippie]

Hi central heating won't keep a constant temperature , rads heat up to required temperature then cool down to like warm with a noticeable change in room temperature. Any ideas on this would be most appreciated thanks

[REDSAW]

turn thermostat up!
what boiler?

[The chippie]

Worcester greenstar ri, turned the thermostat right up to the max but when it reaches that temperature it starts to cool down again

[REDSAW]

Worcester greenstar ri, turned the thermostat right up to the max but when it reaches that temperature it starts to cool down again

yeah, its not reaching temp only at boiler tho!
i take it as its an open vent system, tank in loft?

turn down the boiler stat to half way and monitor for change. if the systems sludged up or the water cant pump efficiently around system then the boiler-reaching its temp will turn boiler off. this way the water has a chance at a lower temp to circulate into the system. this is assuming nothings wrong with the room stat?
a history of what happened since 2 months ago will take away the need of a crystal ball !!