Club 80-90 Forums

Hi everyone my boiler is only running cold water/heating is fine, and the fault code that came up is H3 which is the thermister.so i bought one but cannot seem to find where it goes inside the boiler.the boiler is an isar ideal m30100 any help would be appreciated,cheers dave

the hot water thermistor?.. its underneath the boiler, remove case and bottom cover. remove a plate thats fitted across the bottom, and you'll see it held in with a U clip

Thanks for that found it straight away,cheers dave