Tesla Model S Air Conditioning Noise: This Is How It Works
When the temperature goes very high some Tesla Model S owners may began to hear a grinding type of sound related to the conditioner. Apparently Tesla considers this air conditioning noise normal and note that number of Tesla owners will tell you it wasn't there originally. The noise becomes louder and more frequent in summer or when you drive under very hot climate conditions.
Air conditioning noise goes down as Model S gets cooler
Some Tesla Model S owners say that they get loud noise after initial "start up" of the car with A/C fan cranking up to 7 or 8+ level. However, after a little while, when the car temperature drops the noise usually subsides. If you turn down the A/C fan to level 3 or 4 you can barely hear the noise.
You may say that your previous Tesla didn't have this. Currently Tesla owners say they think this noise and the way it subsides started after software update 7.0 sometimes in end of 2015 or early 2016.
A/C noise is lout when it's hot
"I have heard this noise too," writes a user 5thumbs in Tesla's Model S Forum. "I hear it when the temperature is hot and the interior of the car is hot (after sitting in the sun). Initially I heard it while supercharging and the AC was on. Turning the AC off, and the sound subsided. Now that it gets above 90 in my car, I have been hearing it more often, but the noise subsides when the temperature drops and the AC can catch up. Once I noticed that if the AC was on and the loud sound was blasting and I was charging at a 30 AMP charger, that the "time till charged" was much greater than if I turned the AC off. Not a small time difference. So whatever that noise is, it was taking a lot of energy. Sounds like a buzz or hum but very very loud," he writes.
Another Reason for The Noise
Tesla Model S A/C noise can be loud because of other reasons too. If you drive you car on gravel roads debris can well get trapped inside driver's front wheel. Then they will interact with the fun for the interior or battery cooling. If this is the case, you may need to take your Model S to the nearby service center for the technicians to look at it.
Does your Tesla have a loud air conditioning noise when your car is hot? If yes, does it subside when the temperature of the interior drops?