The A/C unit seems to be good, my buddy walked me through
The process to check it before we shut down the system last year.

The A/C powers on and the vents produce cold air but it is very weak.

The fan on the thermostast does not power on under auto or on but works
Just fine with the heat.

I am clueless here, it is a 10 year old Bryant A/C and I have a two year
Old Lennox Furnace.

Any suggestions to try and fix for a somewhat handy person?

Check your t stat jump
R to G if fan works it's the t stat