Posted by Kaegi [162.158.107.130] on Monday, January 06, 2020 at 13:52:10 :
In Reply to: Hole in back of heater box, '71 Power Wagon posted by Mark [172.69.22.191] on Monday, January 06, 2020 at 12:20:44 :
so you can run fresh air though heater with vent pulled open. to recirculate keep vent closed. ins summer to utilize the vent only open the little door and have vent open for cool air