Air conditioner only works when speeding!

the a/c blower in my 2001 jeep cherokee only works for the very first drive of the day, or if i go over 75MPH on the highway. its 113 degrees here!!! help!!!

You have a bad blower, or your blower isn’t getting any power. Check the fuse first, because the next step probably involves at least a partial dash disassembly.