central heating has stopped working. it was connected with wireless thermostat, intially i thought something is worng with a wireless thermostat, so i decided to remove it and run the system with built in digital timer I have connected terminal 3 and 4. Hot water is working fine but CH does not work, it works in diganostic mode when i press "-/+" and it also work if a run a test program P1 and P2, but other then this CH does not repond and boiler is showing code S.30 (no demand of heating something like this). any clue what might be the issue ? water pressure is between 1.4 bar and 1.7 bar. on test progam and diagonistic mode heating work perfectly fine but only for 15 minutes.

Faleem, November 2013

Just a quick check. Make sure the c/h knob is not broken on the spindle, it could be turned to the off position on the pcb, moving it from the front will therefore achieve nothing

Carefree, January 2014