Astra G Heater O-Rings: Repair Kit vs Typical O-Rings & Effects of Damaged Solenoid Valve on AC

Hello
Is it possible to fit some typical O-rings or rather just a repair kit?
Behr stove.

I am also wondering about the solenoid valve. The original one is damaged (broke), I welded the plastic and it's ok. Will this have any significant effect on the cooling capability of the air conditioning? Because from what I have seen in newer solutions, they did not install this solenoid valve, although they could also change the design of the flaps.

O-rings for 4 binoculars have an inner diameter of 17 mm and a thickness of 2.5 mm

Thank you very much for your answer.

In that case, I do not even connect it because there is a lot of work with it and it is a pity to increase the probability of failure. Although my repair is rather effective because I did a test of 100 switches and everything looks like right after the repair .
I just hope that nothing will leak, because I removed those original rivets in the "valve part" and the whole thing is now on the screws from the engine.

@Megawe I understand that you installed such and everything is ok? I used 3 mm thick and no chance, but I was guided by what I found. My O-ring looked a bit like a quadring and I wasn't whether it was already impressed or in some special design.