I noticed when I had the dash off on my 2011 Plus 4 that an electrical ribbon cable was being fowling the heater control. I moved and tied it out of the way.

My heater control now covers an arc of about 230 degrees.

Ian
2011 Plus 4
Wild Mogs Reims 2019, Goodwood 2018, Isle of Man 2017, Carried on to Caramulo" 2016