Not so sure about that, got the same problem and heater works fine, I just cant get a conditioned rinse. Must be the error code for failed relay on mainboard?
Les
October 2009
F08 Heater relay cannott be activated
this is part of the main control board the only way to cure is to put in a new board but they are about £96.00
phil grimshaw
December 2006
I can answer this question...
indesit evolution 1200 we125 display error message on f-08?