[rsgt]

I thought I would work on my a/c heater box. There is no duct work at all, all the duct holes were taped up. I found out by reading this forum that the diverter box flapper is broken a lot of the time. Well my box did not have the flapper at all. I decided to try and make one. I welded a strap of metal to the rod and cut out two pieces of aluminum and shaped them to fit. I glued in some rubber strips I cut from an old roof rail weatherstrip I had kept. Then I riveted the aluminum together. I installed the box and it works good.