heater problem on 86' 300e
 

my heater works, but i can't seem to get any heat down to the floor, only out of the defroster and two side vents, when i hit any of the climate buttons, nothing seems to happen (heater still blows but air transfer does not happen) any suggestions...???

Look for a broken vac line up beside the brake booster. There is a "y" connector there, one leg goes to the dash vac guage (which probably doesn't work, eh?) and one goes to the climate control. No vac, you don't have anything but defrost.

If there is nothing obvious, get a MitiVac hand pump and see if the system will hold vac (there is a tank in there, too, so it will take a while to pump down). If so, the connection to the manifold is bad, fix. If not, pull the glove box by prying out the little plastic center pieces on the rivets and then remove the latch at the top (two screws). Pull the center of the top edge down (there is a hook molded in it) and pull glovebox out. On the right side of the heater box is a switchover valve with about 8 vac lines on it. Top one is the supply, the others are lines to the various servos.

Pull the supply line and make sure you get vac, then pull the servo lines off one at a time and see if the servos work.

Chances are you have a bad supply line, but you will need to replace the servos if they leak. This is a BIG job (do a search for procedures).

Peter