Thanks again for everyone's help.
The heating valve was the issue and the microswitch was stuck on as everyone said. Took it apart and the microswitch was visibly broken so gonna get it sorted.
Hi All,
I've just moved into a new house and have a few issues with the heating system. I had a completely different system before so hopefully you can me fix this one.
It consists of:
Boiler: Ideal icos
Programmer: Drayton Tempus Seven
Hallway Thermostat: Drayton RTS1
Next to the hot water...