READ AD: AS IS portable air condition not function properly

READ AD: portable air condition not function properly 10,000BTU SOLD AS IS SELLING AS IS....BEST FOR SOMEONE WHO KNOWS HOW TO TROUBLE SHOOT THESE UNITS. NO REMOTE NO MANUAL DOESN'T SEEM TO ISOLATE NO EXTENSION PIECE FOR THE WINDOW....WHAT YOU SEE IS WHAT YOU GET. THE TANK AT THE BACK LOOKS LIKE IT IS A BIT LOOSE SO MAY NEED TO PUT SONE DUCT TAPE ON IT. NO HOT AIR SHOOTING OUT THE BACK. Kenmore Model: 461.35720 VERY HEAVY UNIT. I don't know much about this unit. I have never used it before. Bought it last year off marketplace and plugged it in for the first time today to find out it's has issues or maybe I just don't know enough about it to operate it properly. It doesn't seem to blow cold air. It's blowing air but not at the temperature you would expect for an air conditioner.