Plumbing Info on why does my comibi boiler switch the radiator on by it's self sometimes.
Q) By twitter/shell_from_uk - why does my combi boiler switch the radiator on by it's self sometimes 24/8/2011
A) By Fausto Ferraglioni Gas Safe - Diverting valves not work properly Power flushing required
A) By Billy Plumber Atherton - Could be the divert value mate does it heat the rads when you running hot water if so this value could be faulty.