Please excuse the lack of correct terminology etc but basically I have a problem with hot water when the control is switced to hot water and heating. The water does not heat quickly enough or reaches an acceptble temp (although it is warm). When the water only control is selected the water will heat but takes a long time 2/3 hours. If I use the immersion heater this will take 20/25 mintes from cold. The inlet to the coil is red hot but the outlet stone cold. There is some sort of solenoid operated valve piped into the outlet pipe prior to its retun to the boiler.
The central heating is fine an warms very quickly.
The central heating is fine an warms very quickly.