Is the issue a lot of airlfow due to the blower not functioning or air coming through but the air is cold?

If it is blowing cold air and your engine temp is normal, it could be likely be the monovalve. If the blower is not working it could be anything from the blower motor itself or the blower relay, etc.

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Ali Al-Chalabi

2001 CLK55
1999 Dodge Ram 2500 Cummins Diesel
2002 Harley-Davidson Fatboy
Merlin Extralight w/ Campy Record