A/C no longer working

I don't use the air conditioning very often as I don't drive very far but I did notice it was making a lot more noise earlier this summer. Like whooshing/wheezing off and on like every 3-5 second not ac clutch or blower related. And now thinking back maybe it wasn't as cold as it used to be. But I was reading about the Darth Vader noise (sounded more on the passenger side) so I figure maybe I just didn't notice it before. Yesterday I was on the interstate and went to turn on the AC and now it just make a constant shhhhhh noise (sounds more centered behind the radio) and the air never changed temperature. I have had the timing cover redone and wonder if something was incorrect upon reassembly. But it's been like 20 months since it was done. I maybe used the ac 10 times since then. So I am on the hook for this and needing advice on things I can troubleshoot. This is a CPO Toyota with that warranty but I doubt it covers AC.
Honestly if I new trucks were in stock, I'd probably trade it in. Less than 6 years old and only 53k miles and between the TC, BSM failure and now AC failure, it's pretty disappointing. Good thing it looks great. Anyway thanks for any help.

 

There’s a service bulletin on the squirrel cage blower fan - maybe look for that first?

 

Blower is working fine. Just no change in temperature.

I just read though the service manual and not sure now if this needs to be fixed asap or if I can wait till next year. Manual makes it sound like I can damage things even when not using the ac due to the compressor always spinning with the motor. IDK

 

The AC compressor also works when you are defrosting your windows .
Here is a 2nd gen diagnostic but basicly the same
https://www.tacomaworld.com/threads/a-c-light-blinking.107982/

 

If you use the defrost mode you are also running the compressor- I would get it checked if it was mine.

 

Should be a pressure sensor on the compressor, no pressure, no clutch. But yeah I wouldn't run it like that lol.

 

I didn't notice any flashing ac button light. I can just hear the whooshing noise kick in with the button and no cold air. Not really sure how I can check the clutch. Maybe I will be able to tell if its working at idle with the rpms moving.

 

Could this be a blend door issue?

 

Don't think so. I was able to get heat and switch back just fine this morning.

I can tell the clutch is working cause in park the idle jumps up when the AC button is on.

 

Update: I refilled the 1234yf today with a gauge and one can of Honeywell refrigerate I got at NAPA and followed this yt video.
https://www.youtube.com/watch?v=fcEoGYzr2S8
No more Vader noises and blowing 48 degrees. Just in time for winter lol. We shall see how long it lasts but for less than 50 bucks it worth a shot.

 

You can put a dye in and see where it is leaking.