If MAX A/C only blows out the defrost registers, or if it switches to defrost during hard acceleration, or if the doors move after the engine is shut off, this vacuum line (to the recirculate motor) is the reason. The white plastic is far more susceptible to UV light than any other color, and the gap along the edge of the hood allows it to degrade.
This repair also works for the other hard vacuum lines on the engine. Colored silicone tubing has become an affordable option to keep the factory colors and eliminate future maintenance. Shop eBay, Amazon, Jeg's, Summit, etc.
Another common failure is for the coffee-can vacuum reservoir to crack and leak, but it affects more than just MAX A/C.
For more info, see:
If the blower doesn't move much air even at high speed out ANY of the registers, check the squirrel cage for damage & the evaporator core for blockage.
If the blower only works on HI, see this: