Boulter Camray 5 Combi with Horstmann Centaurplus C27 controller plus room stat.
Central Heating side worked okay although system didn't react when room stat was turned up or down.
Biggest problem since installation (DIY installation) was no hot water on demand. Hot water was only available if the CH was on. We have actually run system with water side of programmer switched off but now in warmer weather this means we have to have heating on to get hot water.
Replaced the flow switch which has cured the room stat problem, heating now reacts to temp changes. But still not getting hot water on demand.
CH can be programmed to be off, turned water temp on boiler front to a high setting, boiler would run for a short period, boiler is obviously only raising temp of water held in small tank within the boiler, this will not give enough hot water to wash dishes. For 10-20 seconds really hot water then gradually the water becomes colder.
Could it be the Danfoss Valve that is causing the problem? Any way to test if it is the valve?