very often the control cable kinks (inner cable ,like a bike brake cable)so when u turn knob it does not activate the flap the previous post talked about.Niether of these answers are expensive to fix,just awkward to get at.
D
August 2008
There will be a little trap inside hosing allowin hot then cold when u turn the knob, spring or arm has gone.
andy
August 2008
I can answer this question...
Nissan Almera E (2001) Blowing Hot Air all the time?