Had a new ac compressor and drier installed last week. The old compressor would make a lot of noise when turning on the ac and it was not cooling much at all. After having it installed by a local mechanic along with the a new drier I noticed the ac only cools when turning on the recirculation button on. I took an ac thermometer to check the temperature on the center vent and it would go as low as 48F with recirculation on. With the recirculation button off the lowest temperature is 64F. And the air feels dry and warm for 64F. It takes 20 minutes for the ac to cool with the recirculation button on to 48F. I also noticed the gas mileage dropped from 16.7 to 16.2 mpg after having the compressor installed. The mechanic who installed the compressor and drier said everything is fine. What could be the issue for not cooling without the recirculation and for it to take a long time to cool well with recirculation?
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