sqeeking noise when ac turned on, stops after car warms up

What is your question?

Car sits overnight in garage. Start car, turn on AC, sqeeking noise starts on left side of engine bay, gas the car a bit, it stops and a few minutes after running stops. No more noise the rest of the day during operation. only after its sat for 8+ hours does this occur

What makes this problem better or worse?

Warming car up before engaging AC