courtesy of Bob, The Auto Answer Man
I have a Toyota with 25,000 miles on it. I notice when the temperature gets into the 85 degree or hotter range, my air conditioner will not put out cold air at an idle or when I'm going less than 35 miles an hour. If I get on the freeway, then it will blow very cold air. If I come back into town from the freeway, and drive at city speed limits, the ac blow warmer than when it was on the freeway! Do you have an explanation for this phenomenon?
There is not enough air flow through the condenser coil. Make sure that when the a/c is on that the radiator fan and any auxiliary fan are working. The reason the a/c blows cold at high speed, is because the car is forcing the air through the radiator and the condenser coil.
Bob, The Auto Answer Man
Have a car care question? Visit our automotive maintenance section and see if we've already answered it or a similar question.