Ok i have a 2000 civic that i have been driving since 2007 i have never had a problem with the a/c until now. when ever i have the a/c on i hear sum rattling noise coming from the engine.When i go to turn it off the sound is gone. The A/C works fine though but i noticed at some point when i drive the car for more than around 25 mins the a/c would stop working for about 5 mins it would jus blow out warm air then go back to cold air. Could someone please tell me what the problem is? i really dont wanna go to a shop to fix this tiny problem i would like to see if i can do this on my own. i would appreciate all the info from u guys.

 

Your compressor clutch may be failing. Check this: