Central Heating

HW and CH not coming on together

Anonymous user 09/03/2024 - 2.59 PM

Hello I have a strange problem with my central heating/water system, it has been this way for a while now having previously worked fine for years The problem is that the central heating and hot water cannot be on at the same time. In addition, the only way to get either to come on is to follow this bizarre sequence: To get central heating on - turn on hot water (either by timer or advance button on control), turn on heating, turn off hot water. Only at the point of turning off hot water will the system then fire into action. Similarly, to get HW to turn on - turn on CH, turn on HW, turn off CH Anyone have any ideas what could be causing this? Is it a wiring problem? A problem with the control? The 3-way valve? Anything else? Should I just find someone who knows what they're doing to come out and fix it for me? Any suggestions gratefully received. Thanks Dan