Just to add some other info.
I have been trying to start the CH by using the HW overide button on the Programmer (with actuator removed) for about four hours with no joy.
I have just tried to start it again five minutes after it would normally have been tripped by the programme i.e on at...
So to recap....
I have cleaned the system.
I have replaced the room Thermostat.
I have replaced the Actuator.
The boiler works but trips when i switch it to Hot Water (HW)
I can get hot water and Heating when i remove the actuator and manually switch the three way valve round...
Thanks to those who offered suggestions but i am afraid it is back to square one with this!
I have flushed the system through (soaked for two days and then flushed through).....dirty water but not sludge came out.
I have since changed the room thermostat (only because nothing was happening...
I have a problem with my Central Heating that i hope someone is going to say "thats definitely.......". It is one of those systems with a boiler behind the fireplace and the boiler and gas fire work fine (when they are running).
the central heating wont come on via the timer as normal. When i...