...'Before being accused of being an invalid, I've done the searches on FerrariChat for the symptoms I've got and they seem to be unique? '86 328GTSi, my A/C blows cool and works beautiful. My LH heater blower quit a year ago. My RH heater blower just quit. But I still have plenty of warm air that circulates out of the vents to keep the cabin very warm. Looking at the underside of the panel that shows the index of fuses and relays, I do not see a LH or RH heater fuse/relay? I take extremely good care of my car and 'am proud to say that the "slow down" light on the instrument panel has never come on! Question: What circuit of fuse/relay are those heater blower switches connected to???
Try looking for that information here: http://ferraridatabase.com/The_Downloads/The%20Documents/Owners%20Manual%20328%201986%20US.pdf Good luck!