I have a 1992 chev S-10 pickup and have a problem with the heater. The
blower works fine, especially on cold air, however, when I switch to hot
air, I get very little coming out from the defrost vents on top of the dash.
Most of the hot air (and it is plenty hot) comes out from below the dash
from the vent.
Anyone know what the problem is and what is envolved to fix it?
Any help appreciated.