I have a 2002 blazer ls 4dr 4x4. I have had my a/c servised and it is working fine. However the blower will stop working after about 1/2 or 1 hour of running so cold air still comes out but not with hardly any force even on high. Shut the engine off for a few hours and it will work again. What's up.
Thanks

 

Also when I turn the control on air max I can hear air blowing like crazy behind the dash but nothing coming out the vents. Blend door?