A/C is not cold when idle

Okay guys, long time no see. After I fixed those now the problem has come back again. Went to mechanic he checked pipes no leak and Freon level is okay. He said this could be the compressor issue. Just to remind the issue here the cooling air is cold when I drive but when idle or in a traffic area it became hot a little bit sometimes. It becomes so hot like the A/C is not on at all.
Just wanted to know if this issue is due to compressor or not before I replace it?
Thanks

Okay. If I did that what will be the next? Probably going to do that tomorrow because it is night here.
Btw already checked the fan and it’s working fine and the condenser is clean from dirt.

After that happened I use push auto at 23 c. But now I have lowered to low and it is working fine. The air is cold. I sprayed the water to condenser now it is cold I has been idle for like 5 minutes.

Well, I cannot check the pressure by myself. I already checked before he said it was fine.

Well, I guess I have to take to a mechanic.

Okay, I will try to rent one and then going to post the results.

One note; when I start the car turn on A/C on I hear a hissing noise. It only happens occasionally.

So that is natural right? And lets say both low pressure and high pressure are in normal range that is going to be the compressor issue then right?

Oh, Okay. I am going check it after a couple days. Thanks for the help.

Okay, here the results looks like they both are in normal range.
But he said your compressor is getting weak and it’s an electric compressor not the clutch one and not sure what are those. He said since we are in summer and it is about 45c here so it kind of normal for those electric compressor.