That will give the engineer a few more things to have a look at, I think we are being fobbed off at the minute but thanks for everyones help and ideas on this, it gives me something to get them to have a look at as it feels sometimes like they are having a wild guess and to be honest central...
The radiators will begin to cool down before they reach the temperature that the room stat is set to. The house never warms up to the temperature on the stat on the hallway.
By "switch off " I was meaning the radiators start to cool down despite not reaching the temperature set on the room...
I hope someone can help. We have been having problems with our Boilermate 2000 which is about 7 years old. The radiators don't stay warm until they reach the room stat temperature. Frequently if you switch the system to permanently on or the boilermate starts on the timer the radiators will go...