Hi there, thanks for the link they seem to be suggesting the foot well heater potentiometer. I do recall Ian mentioning this before when I queried this.
Also i think Ian mentioned it was a relatively inexpensive fix (£20 ish). So Ian if you're out there can you please put us out of our misery. At this point in time I’d gladly spend a good bit more than that to sort it out
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Cheers,
Builder22