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Hi, Thanks for response, They are "range" valves, simply click on top of valve coupling. when water off the heating valve does open in response to stat and boiler does fire, just that it fires for 30-40 secs at time. However, when heating on on programmer, but valve for heating may be...

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...

2 motorised valves, one for CH and one for HW. Replaced thermistor (£10) earlier and within an hour temp has risen dramatically. Rads and flow now getting v hot. If PCB faulty/on way out would the improvement above have happened by replacing thermistor or would boiler just have carried...

I was having similar problem with my suprima 50, boiler only on for 30 secs or so and kept kicking in but not locking out and flow/rads etc just warm and not hot so house not budging from about 17 degrees. Was as if boiler stat was saying temp satisfied when it obviously wasn't. Anyway, just...

Thanks, I'll try that, what about water cyl stat? Any ideas here, water hot from taps etc but cyl stat indicating temp around 35degrees. Does anyone know if the hot water temp, how long it's on etc will affect the central heating side of the system?

scatmanjohn, cheers, Flow pipe is only getting warm, not hot to touch. how do i go about finding out which fault it is? Also, just had heating off for hour or so and hot water on, boiler saying temp satisfied but cylinder thermostat and hot water valve are open indicating it wants heating...

Boiler temp always set to max, recently boiler appears to cut out after 30-40 seconds, doesn't seem to be on long enough to heat water to high enough temp to heat rads to me, but what do i know?

Yep, pressure up to indicator. Rads only warm to the touch, not piping, same as flow and return. Could the water temp be the problem? ie if thats low for some reason the colder water would make water flowing through pipes colder, hense colder house or is that too straightforward? Or...

Bit stuck there, is there an easy way of finding out? There is a cylinder and red vessel above with pressure guage on, white vessel just off cylinder which i think is expansion tank? When pressure drops i open two valves/taps to raise to marker? Tribune cylinder that says indirect 180 on it...

Hi, It is on highest, 3?

Hi all, I am new to the site so please bear with me. I have a potterton suprima 50 boiler, a sunvic programmer to control CH and HW and a sunvic digital room thermostat to control heating temps, programmes etc. CH kept permanently on at programmer and controlled at digi stat. HW just at...