'71 Heat/defrost problems

[red71cheyenne]

Originally Posted by Murphy IRE

I finally got all the heat to shut off during the summer! However, I had it up in the mountains and needed to get the heat onto the windshield. It blows really strong out of the vents, but it still wont direct much of anything to the windshield. Should I try adusting the cable on the box (pg 126 in the LMC catalog - of course it's not labeled as a part for sale). There is an old foam flap that's supposed to divert the air the two defrost hoses (it's really worn). So any help is appreciated
1) Name of the part
2) Any suggestions???

Thanks,
Sean

I've always called it the flapper, but thats the part that shuts the heater off and puts the air flow up to the defroster. Had to do some work on mine when I rebuilt the heater box. If you can get to the flapper, clean it up(rust) and replace the foam on it. Adjust the cable attached to it to fully close off the heat airflow and you should be good on defrost. Mine works like a champ now.