Recent content by JeremyC

Thnx Dave where do you check for the 240 V on the boiler? My brother also suggested the valve ,but how could this cause an intermitent fault?rectified by my switch off of systems at mains supply, as I do regularly.. Jeremy

The boiler seems to work normally ,then every other day or so randomly the heating systems fails to switch on even though thermostat is in on position. Anyone got an idea - I already chaned programmer, as if you reboot at wall switch it resumes work perfectly.Should I try new pcb?