Yeah, I agree with (absolutely no technical knowhow to back it up) getting it checked out.

When having the mechanic ride along with me to reproduce the current engine problem I am experiencing, the first thing he did when I started the car was fire on the AC as cold as it would go and as high as it would go to see if it was related to my problem. I experience no loss of power related to the running of it as far as I/we could tell.

Good luck!