just got home and my isar boiler is flashing F.H can any one help
Steve c, August 2009
thanks to IAN and "a"- boiler checked out by plumber it was main pcb will be replaced by wednesday a very common (defect?) with boiler but manufacturer does not recognise this fact, boiler only just out of guarantee, been serviced but will now cost a 70+ aged person £160-200. thanks again for help
Tommy, August 2009
First thing to check is the power supply at the mains connector L3, you need to check this supply for continuity and polarity. There should be a fused switched spur before the boiler, check this fuse also.
