[maerlyn]

under the glove compartement, you'll find the blower's rheostat. It's a grey cylinder with 5 wires. Check for damage on the wire. If they are ok then it's probably the resistor. To access them open the glove compartement unmount the blower fan. For the problem of the air flow more on the defroter than the panel vent...it's more delicate... It can be moisture your problem. Or the selector that do not oper properly. to check on it you have to unistall the dash (i think. never done it) If someone know something less radical let me know