Pleasehelp it's 100+ degrees in my home and when I turned our Gibson air conditioner on it seemed to befine. Now it'smaking aloudnoise that soundslike it's coming from the fan / motor. It'scooling fine, but I'm afraid to run it with the noise it's making. We purchased it 2 yrs. ago in like new condition, however the only thing itdidn't come with a user's manual. We've only used it approx. 6 months (3/yr)