Hi, this is my first post, hope someone can help.
Arrived home yesterday to a cold house, no lights on boiler and programmer dead.
Checked mains fuse to find it had blown. fitted new but boiler dead, checked pcb fuse, this had also blown,resolder all dry joints i could see, fitted new fuse and test, blew instantly. After much messing about, if the overheat thermostat is taken out of the circuit, everything stays ok, ie, pump will run, diverter lights up and boiler fan runs, except there is no ignition and the red led is flashing. How do you test the boiler o/h stat, using meter across spade terminals it reads short circuit, is this correct. Is it best to change the pcb with the latest upgrade kit.
Any help is much appreciated
Arrived home yesterday to a cold house, no lights on boiler and programmer dead.
Checked mains fuse to find it had blown. fitted new but boiler dead, checked pcb fuse, this had also blown,resolder all dry joints i could see, fitted new fuse and test, blew instantly. After much messing about, if the overheat thermostat is taken out of the circuit, everything stays ok, ie, pump will run, diverter lights up and boiler fan runs, except there is no ignition and the red led is flashing. How do you test the boiler o/h stat, using meter across spade terminals it reads short circuit, is this correct. Is it best to change the pcb with the latest upgrade kit.
Any help is much appreciated