Over the last couple of months my heater will only blow hot air out of
the windscreen and foot vents, but will happily blow cold out of the
center vents. I have had no choice but to not have the blower on at
all. This leads to the centre console becoming very hot. I know it will
default to full heating if some component fails but do not know where
to start in diagnosing the problem. It has manual heating control and
not climate control.
Any help would be greatly appreciated.