Hopefully someone can help here I have a 1995 Lumina apv,on the control panel I can turn the heater fan on low ,medium,and the fan works as soon as I put it on high it shuts off,weird and really sucks when its -30 does anyone have any suggestions...thanks in advance

My Lumina (car) did the same thing. I lived with it for 6 months before I finally figured out that the HI fan setting has a separate fuse that was blown. Check that first. I think the fuses are HVAC 1 and HVAC 2. Hope this helps, if not, then there is a relay under the dash that is probably bad.

Thanx I'll check that didn't think there might be two fuses hope your right because that would be a fast fix,thanks again and Merry Christmas :)
Nope one fuse guess I'll keep checking for other options

Did you look in the underhood power distribution block?