front defroster

I have the same problem on my 1997 Accord DX. I took it to the dealer and two other mechanics to get a second and third opinion. They all agreed that the problem is with an electrically controlled diverter. This would require the dash to be taken apart and this part replaced at a cost of several hundred dollars. I decided to just manually close the two front side vents by rotating the open/close wheel when I want full defrost. This will do the trick and save you $$$$. Yeah it's a pain, but I don't want to pay a lot to fix this problem.