Window not opening. The handle locks after turning 45 degrees.

Hello.
When I try to open the window, the handle turns 45 degrees and there is no way to move it further. It is a plastic window, but unfortunately I do not know what brand. The window had been closed for several months and no one had touched it. I have already tried to press and tap the window frame, but to no avail. I only noticed that after turning the handle by these 45 degrees, the whole window moves slightly.
Unfortunately, this is not my apartment, I have already informed the owner, but knowing him, I will wait until winter. So do you have any ideas what I could try to recreate this window myself?

Is it a tilt window? And what kind: balcony or ordinary, window?

If the handle does not turn further, it means that something is blocking its further movement.
First of all, you should focus on opening the window, because only the open sash can do something about it.
Try to press the sash against the frame at various points when turning the handle.

gieniapierda wrote:

Is it a tilt window? And what kind: balcony or ordinary, window?

It is an ordinary hinged window.

misiek1111 wrote:

Try to press the sash against the frame at various points when turning the handle.

Ok, I'll try to recreate it.

Maybe the gasket just stuck to the frame?
But, 45 degrees is unlikely to be the opening position, only half, so maybe there is a key lock in the handle and it blocks the opening of the window.
It's best to take a photo, otherwise we'll be guessing.

I was struggling a bit with this window today. I pressed but nothing. I don't know if I messed up more, because the handle does not return to the vertical position now.

I am uploading two photos of what this window looks like:

You can also try to lift them up. It may have fallen off the hinges and is hooked.

Or painted on the outside and the paint glued them to the frame.

I don't think I'm going to open that window myself, but never mind. The topic can be closed. However, the owner surprised me and sent a specialist who said that he would not open the windows and would install a new window for me. Unfortunately, he did not say what happened to the window, so I will not share this information. Thanks all for the advice.

Poor professional. Each window can be opened by removing the glass. After that, just fix the fitting.

bmw5256 wrote:

However, the owner surprised me and sent a professional

Well, then I was right to report the owner, hmmmm?

I have a similar problem, only from the side of the repeal position. The window only tilts and I can adjust the unsealing. Then something blocks the handle and I can't open or close the window properly. Do you think the problem lies with the limiters in the frame or the espagnolette? Earlier, I closed the window by force, until something slightly crunched. I greased the window, it helped for a few openings, and then again the same thing, but I did not remove the limiters to check which one was blocking. I will be grateful for advice on where to look for the fault in the first place, because it's cold outside and I don't want to cool the apartment.

It is a 20-year-old PVC window, but with Winkhaus fittings. There is no lever that blocks the incorrect operation of the handle. Often used because in the kitchen. Unfortunately, ongoing maintenance lagged