Hi all,
The facts;-
House built circa 2006, potterton suprima 50 boiler, 3 storey house, boiler on ground floor with programmer off it, hot water cyl and expansion tank on 1st floor with two MV's etc, sunvic digi programmable room stat in hallway.
Had few issues recently with heating ie boiler keeping firing up and only on for 30 secs or so before turning off, hence taking an eternity to get house up to temp if at all. Repaced thermistor, latest thing is to replace PCB which i know are problematic on these but this boiler has the upgraded one? However, i am not sure it is a pcb issue.
Generally HW just controlled at programmer by boiler by kicking in for few hours a day, CH left permanently on at this programmer but controlled by digi room stat in hall. Anyway, having played about with it last few days it seems that if the hot water is on permanently the heating is fine, however when i program the water to come on for say 2 hrs in am and same in pm, the heating is affected and i get the problem above ie rads, flow pipe etc get warm but never toasty and water temp at taps is lower??
Surely i can have the heating on without needing the hot water permanently on can't I? Is there a problem here and if so any ideas how i remedy it?
The facts;-
House built circa 2006, potterton suprima 50 boiler, 3 storey house, boiler on ground floor with programmer off it, hot water cyl and expansion tank on 1st floor with two MV's etc, sunvic digi programmable room stat in hallway.
Had few issues recently with heating ie boiler keeping firing up and only on for 30 secs or so before turning off, hence taking an eternity to get house up to temp if at all. Repaced thermistor, latest thing is to replace PCB which i know are problematic on these but this boiler has the upgraded one? However, i am not sure it is a pcb issue.
Generally HW just controlled at programmer by boiler by kicking in for few hours a day, CH left permanently on at this programmer but controlled by digi room stat in hall. Anyway, having played about with it last few days it seems that if the hot water is on permanently the heating is fine, however when i program the water to come on for say 2 hrs in am and same in pm, the heating is affected and i get the problem above ie rads, flow pipe etc get warm but never toasty and water temp at taps is lower??
Surely i can have the heating on without needing the hot water permanently on can't I? Is there a problem here and if so any ideas how i remedy it?