Ok here goes... the above boiler was working fine!

After coming back from a weekend trip i noticed the heating side of the boiler is non operational. The hot water is fine and hot. The pump is spinning, the pressure std 1.5 bar. No flashing led's, lights up to 80c. The CH flow pipe is hot but the return stone cold. No room stat attached. Anyone have any idea's? I'm thinking the diverter valve, but unit only 24mths old.

andrew D, February 2014

Problem fixed.

The diverter valve needle was stuck solid. Replaced with a service kit, all done. Not a difficult job after all.

andrew D, February 2014

Left running for over 30 mins, no sign of anything changing, no error flashes.

andrew D, February 2014

how long did you let the system run for?.If there is an issue it will shut down so as long as you switch heating an and the boiler fires up I would leave it running until it either works (due to air lock) or shuts down and comes up with error code

A1, February 2014