The Boiler is a Stelrad Ideal WLX and we have only replaced the actuator with a Sunvic SM5203 which was a like for like swap, we haven't touched the valve.
A week or so ago our central heating remained on after the timer had gone off we manually turned the heating off. After this we had no central heating at all but hot water was working fine. Consulted a plumber who told us the problem was the actuator on the central heating valve which we have since ...
