Before, I break out the Bentley and Haynes manuals:

Yesterday, I not too gently tried to throw my defrost lever from minimum
(left) to maximum (right) after hopping into the van, sweating from a bit of
exertion. I felt some resistance and then the lever went "rubbery" and now
sits in the center with no defrost air moving up through the vents.

I suspect that the flap was frozen in place (I'm in the NE US and we're
experiencing a bit of real winter) and I forced the issue and disconnected,
slipped or broke something.

Anyone else BTDT and found a solution?

Thanks,

Paolo