ISO: a mechanic. I have a 2000 Chevy blazer 4 door. The heat does not work. The AC works, but when it is turned to heat it blows out cold air. I read that it could be the hoses connected to the heater core are clogged. I am looking for someone who can fix this for a reasonable price. It runs great. I can come to you or vice versa. Located in Benton.