Last winter my siemans programmer stopped working, I bought a replacement RWB9.cw and wired up exactly as instructions and everything worked fine until summer (but as my heating was always on, no suprise as hot water came on with heating).
With the arrival of summer and no requirement for heating, I turned my heating off and used the hot water only mode, but to may amazement, the heating came on and the hot water also kicked in. I couldn't turn on the hot water without the central heating.
Upon investigation, and after consultation with a plumber friend of mine (who said it would more than likely be my motorised control valve). I bought and fitted a new sunvic 3 port motorised valve.
Now when switching on hot water, only the heating kicks in, the water doesn't get hot.
I would be grateful for anyone's advice on this.
With the arrival of summer and no requirement for heating, I turned my heating off and used the hot water only mode, but to may amazement, the heating came on and the hot water also kicked in. I couldn't turn on the hot water without the central heating.
Upon investigation, and after consultation with a plumber friend of mine (who said it would more than likely be my motorised control valve). I bought and fitted a new sunvic 3 port motorised valve.
Now when switching on hot water, only the heating kicks in, the water doesn't get hot.
I would be grateful for anyone's advice on this.