I have just fitted replacement PCB to my daughter's HE24 boiler as there was no LED display & no hot water or central heating. Central heating is now working fine but still no hot water - the LED panel has a letter 'c' only - anyone any ideas ? Is it a diverter valve problem or what ?

Dickie C....., June 2012

ideal isar 24HE
GCN 47-348-31
boiler inop/dead
replaced PCB
only CH working
did you refit the jumper links in the correct position on the PCB?
chances are you have fitted them the wrong way around & turned your combi boiler into a system boiler
there should have been a guide to jumper positions that came with the new PCB
double check jumper positions first

manwithnoname, June 2012

Sounds like a turbine sensor fault, Have you removed the sensor? if so check it is fitted the correct way round as the only work one way. Otherwise replace the trubine sensor.

Bill, June 2012