Having replaced a resistor pack a year or so ago, thanks to the outstanding collective knowledge of this forum, I'm hoping someone else has experienced the following and can share wisdom. 

My heater / blower control dial - manual, 4 settings, no display - is now out of step with the actual control settings, and has more travel before anything changes, so it feels like something has slipped, or snapped, behind the dash. 

So eg when I go to turn it on, it travels to about setting 2 or 3 before it clicks up a speed, and then the reverse happens going down the settings. 

The particular nuisance is that it won't turn off at all, as when the dial is at 'off', it's still functioning at speed 1. And I don't want to leave it like that for too long, as it'll shorten the life of the replacement resistor pack. 

I've found a couple of YouTube videos showing me how to remove what I think are the relevant bits of dash (crucially without taking the bloody steering wheel off), but I haven't found anything here or elsewhere about what's likely to have happened to the actual control knob - or what it's attached to.

Any experience folks?
 

Bumping for the weekend crowd.