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Help with the above fault. The boiler works fine on DHW but when on heating, the boiler fires for a minute or so, then goes off. If you turn off and reset, same happens again. Suspect Thermistor. The boiler is 4 1/2 years old. The boiler goes through all the correct procedure, just doesn't...

Hi All, Bit of help with a Garda HE Plus. No hot water no heating. Checked diaphragm and that looks ok (no signs of wear). Pin comes out but not enough to operate microswitch. temporarily bent the switch contact to make switch operate and boiler worked fine for about an hour then stopped. The...

I am looking for a little help with a wiring centre and the wiring formation for a system boiler. I have no problem wiring a conventional system with external pump and 3 port valve, but the fact that the pump is internal is tending to concern me, due to the feed being from the boiler. What...

Called to one of these today. Not seen one for ages (should all have been ripped out by now). Fault is that the boiler is not working. With the boiler turned on, no ignition sequence. There is a live to the PCB but no sparking at the spark probe. If you disconnect the 5 wire multiblock from the...