I am fortunate to have owned a Zanussi FL828 for the past 13 years. It has never missed a beat until recently it stopped heating on the 40 degrees cycle. All appears okay on both the 60 & 90 degree cycles. Is the problem likely to be a thermostat or something I could attempt myself if I could get the spares, or should I simply be greatful for such long service and lay it to rest? Any ideas or thoughts appreciated.