Potterton netaheat gas fired boiler

[dafydd]

I am having some intermittent problems with my Potterton Netaheat boiler.

The hot water system seems to be running fine but the central heating is shutting down intermittently. The pipes either side of the boiler are hot but there is a constant clicking noise coming from what I presume is the "box" that directs the heat to the water or central heating (you can see I am no expert!). This clicking noise is only present when the heating has gone off prematurely. It seems that the system is trying to start up again? Sometimes it is possible to get the system going again by re-positioning the lever (on the underneath side of the "box") to the heating position (it was in this position when the heating refused to start). The boiler then fires up and the pilot light ignites but appears to go out again (cannot see it through the viewing window). I think this may be a red herring as the heating remains on.

I have justed moved to this new house so am not sure what the service history is.

Does anyone have any ideas?

Thanks for your help.

 

[ollski]

the clicking noise is the boiler attempting to relight...it will give it 3 attempts and then lock out, when you reset the boiler by turning it off and on again the cycle starts again. Don't know your system but if you have a pump is it working when the room stat is calling for heat?...if not the pump could be gone if yes I'd guess at the ch overheat stat.