J
jmansford
My mother-in-law unfortunately has an Ideal ISAR HE24 installed via warm front back in 2006. Last year I changed the PCB for the 'orange' version.
She has been reporting that the boiler has been running the CH in the middle of the night despite the timer being setup correctly. I cannot verify this, however with the timer not set to call for heating and no call for DHW the display correctly shows then intermittently in flashes with a 'broken U.' (see pic).
I can't find anything in the manual about this so am suspecting the user control unit has gone. If it is that could it also cause the CH to come on randomly?