I have just moved into a flat and have an Isar HE30 when you turn power on you get the burner light come on and stay on there is something on other display but you can't read it as it's only showing one piece of a letter or number I have tried resetting a number of times but nothing is happening the Drayton programmer looks OK.
Any help on this would be much appreciated does this seem like the control unit or the PCB?
Any help on this would be much appreciated does this seem like the control unit or the PCB?