When I arrived I was given a different type room than requested. After going to my room, I realized that it was not a handicapped room, which in all fairness I did not request. I did go back to the desk to request one, but if one was not available, I asked to be in room closer to the elevator-this request was denied due to full capacity. On the second night of my stay, the air in my room went out. I woke at about 11:30pm to a room that was almost 80 degrees. After two calls to the front desk, the maintenance associate arrived. I was informed that the drip pan was full, and after draining the drip pan, I was told that the unit was working. Approximately 20-25 minutes after the maintenance associate left, the AC unit began making a clicking noise followed by a noticeably loud buzzing noise. I called again for service-to which they responded quickly. I was informed that the unit was blowing cold air, but there was no explanation for the loud buzzing sound. Also, because the hotel was full I could not be moved to another room. I've stayed at other Hilton locations and this is the first time I've had a less than 5 star experience.