Hi all. We recently inherited a a 2012 Micra, the only issue is the heater was stuck on cold. I have seen this has been covered a few times and seams to be common that the cable jumps off. Well mine had jumped off because the mechanism is really stiff to move but will move with force. Is there a way of accessing the mechanism more or do I need to remove the dash and HVAC unit and replace it? I have full travel and nothing catches it just won't easily move.