Man tgs26.440 heater problem

I’ve got a 26.440 Tgs , the heaters work fine but I can’t get it to blow on the windscreen to demist it, not a problem now but will be in a few weeks!

Any ideas or common faults?

Thanks

It sounds like the connecting air pipe that blows in the direction to the windscreen needs to be joined up again as it may have fallen off, this means taking apart the dash to access it or lots of plastic areas .
Hope that helps, like you said, with the Autumn and Winter looming, you will need it working .

Will give that a try this week end, it doesn’t sound a fun job really!

Before pulling it all apart, it could be the selection switch that is broken or loose, where it is not selecting the windscreen mode of air flow .
Or the fan motor has had it.

The heater blower works fine, I just can’t get it to change where it blows to,
I wouldn’t mind if it was stuck on the windscreen!