I have an 85 300TDT, my problem is that the climate control only seems to work in defrost or high fan. When in auto mode it does not work at all and the low fan does not work. I have replaced the CCU dash controls with a salvaged one (in very good condition), no change. There has been an intermittent clicking noise behind the glove compartment. I have also replaced all the old fuses with new ones. Strangely it will start to work normally for no apparent reason and may run that way for a few hours.
Any Ideas would be greatly appreciated.