The connector behind the centre console on mine doesn't feel right . Its very loose and a very short joint . I will someday have a proper go at it and see whats wrong or bung something in the gap and wrap in duct tape . I think that might solve the window heater lack of blow .
At the moment I just open the windows a bit or have the tailgate open , unless its raining .
Last year ,or two years ago, it did get a bit hairy when I drove through freezing fog and I couldn't get the heater dial to heat the windscreen . That's sorted now .