Ideal Classic NF80 problem

[jnw]

I have been called out to service an Idel Classic NF 80 boiler
wich was not working. When I undone the control box so that it was
hanging on its wiring the boiler started up as it should. so I put the contol
box back in position and then nothing so undone the control box again as
before and the boiler stated working again. So I checcked all the connections and all the wires for continuity and all seems fine but when I
Screw the control box back the boiler fails to start. I have been in contact with technical support and they say it must be a loose connection but I still have not found one. Has anybody had a problem like
this or any idea what it could be.

Thanks Jeff

[Puddle]

Well if you can not find a loose connection ,it is probably a dry joint on the pcb,remove pcb board and resolder main connection points and relays
Some would say just replace pcb

[Mbear]

I have been called out to service an Idel Classic NF 80 boiler
wich was not working. When I undone the control box so that it was
hanging on its wiring the boiler started up as it should. so I put the contol
box back in position and then nothing so undone the control box again as
before and the boiler stated working again. So I checcked all the connections and all the wires for continuity and all seems fine but when I
Screw the control box back the boiler fails to start. I have been in contact with technical support and they say it must be a loose connection but I still have not found one. Has anybody had a problem like
this or any idea what it could be.

Thanks Jeff

Had a similar issue with an ideal elan, again pcb flap down it worked fine, pcb flap up it was clicking and clunking, it turned out to be the aps wires, but I changed pcb and harness and it was fine mate

[jnw]

Thanks for that I will give it a go