Glow-worm 12txi driving me mad !?

i had this fault that became more and prevalent until it tripped daily. I noticed that when I disconnected the pump feed (be careful as live!) the realy that switches the pump clicked and the boiler sprung into life. I evetually resoldered the connections for that relay and is now okay. I inspected the baord and there was no obvious dry joints but resoldering seems to have done the trick

eno
December 2010

From the installation manual:

F13 PCB Memory or sensing fault

Loose connections on main PCB or display PCB.
Central heating flow or return thermistor wires unconnected, faulty, trapped.
Electrode ignition leads loose, unconnected, faulty, trapped.
Earthing connection loose, disconnected.

Carefree
September 2010