Blower works to rear cabin, but no cold air to front cabin.

What is your question?

2008 BMW X5 last week the front air would wither just slowly die but controls showed at full strength. I would turn off momentarily and turn back on and it would be fine. Became more and more frequent and now no air from front blower, but have air to back with rear blower motor. Changed the blower motor controller, but didn't work. Might it be the blower motor itself or another issue?

What makes this problem better or worse?

Nothing has helped.

How long has your 2008 BMW X5 had this problem?

3 weeks