Thanks for reading this post. I have developed a little problem with my heating system and need a little help...

When set in the Auto posistion on both controls, I get warm air by my feet and cool air coming out of the dash vents...

When on DEFROST, fan on HIGH, I get warm air out of the outsides of the vents, and cold air coming from the insides of the vents(bottom of windshield)

With the fan on high, temps set high on both sides, position to dash vents on position selector, I only get cool air from dash vents and no heat.

Is there some kind of "mixing door" that is not funcioning properly?

I am stumped on this one.

Thanks in advance for review and possible solutions. MIKE IN MN

'05 MAGNUM/5.7 Hemi
'67 Coronet 500 Convertible 383
'67 Charger 383
'67 Coronet 500 SE four door 273