If you have moisture on the inner surfaces of the glass, that indicates a seal failure. Have you tried contacting the dealer or the manufacturer? The windows should be covered under a warranty.

I agree fully with skydawggy, you have seal failure that should be covered by warranty. What brand windows are they?

The seal failure also means that the argon is gone so you've lost any insulation value between the panes.

The windows were manufactured by Champion Window and Siding. Do you know if this type of problem can be repaired or if new windows have to be made? Do you know how someone even goes about testing the windows to see which don't have a seal failure? The whole install was one problem after another - took over 5 months to get properly manufactured parts so there was no gap (with daylight showing) above the casement crank housings. Local reps stuck with it until all the previous problems were resolved but now this! Because of all the problems I don't have a lot of faith in the windows.

As you said, you ARE stuck with them, may as well make the best of it.

If they are double hung windows, it's a simple matter of exchanging the old sashes for new ones without having to redo the entire installation.

Have you contacted Champion yet?

Please let us know how things work out for you.

Thanks for the responses to my post. The windows are casement windows. I just opened one of them and it looks like they could probably unscrew the window from the support bracket and replace it. I haven't talked to Champion yet because I want to be more knowledgeable before I do. There were so many problems with the quality of the windows and the install that I don't want to have any doubts about the accuracy of what they tell me, so I'm still hoping someone can tell me how the seals in a double pane window can be tested. Quite honestly with the history of this install I'm worried about whether or not I can trust any replacement they make for me. The windows do have the Good Housekeeping Seal of Approval and Champion is a member of the Better Business Bureau, so I may end up contacting both of those agencies as well.

The only way moisture can get between the panes is if the seal has failed. Stop worrying before even contacting Champion. Pick up the phone and call them. The BBB, Consumer Affairs, Attorney Generals etc. aren't going to do anything until you have contacted Champion and given them a chance to fix it.

You are probably making a big deal out of nothing. Read the warranty. It probably says something to the effect of "the manufacturer warrants against visual obstruction of the glass for a period of 20 years from the date of installation". That means a glass seal failure.