We have 27 yr old house we are selling...windows are original...double paned, aluminum but with thermal break which was an upgrade when house was built...They have tilt in feature on bottom ones and a weird latch system...

Under the bottom lip of the window there are two pieces which slide--

Slide them far enough and they lock the window...

Put them in the right location and squeeze with bottom lip and the window unlocks and you can slide them up...

There is loud click on most of them when you hit the sweet spot...

We have contract and the buyer had an inspection---the guy said that 3 windows wouldn't open...2 in dining room where there are 3 windows and 1 in corner bedroom...there are two front bedrooms but one is more "corner" location than the other.

We got all windows in the dining room open (two were pains) and got the one in bedroom open---sent photos to our RE agent who sent to buyer and she was satisfied they were functional...

Then we tried to open the window in other front bedroom-- in case that was the one he meant--It wouldn't open...

We tried moving latches to different positions along bottom rail, tried pressing down to make it fully latched so it would unlock but just couldn't get it open...

I had the windows washed before we listed about 3 weeks ago and they all opened then or the guys would have said something--they had to tilt them out to clean because the screens aren't made to be removed...

Anyone familiar with this type of window?

Any suggestions for how to get this to open? And make it easier to open in future?

Any way to tell if the latch system is really broken w/o trying so hard and breaking the glass maybe or all my fingernails?

Appreciate any suggestions/info...