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Needsdecaf
Active Member
Yes, my car does this when not asleep. Not sure if cooling fan or coolant pump or what. Has always done this from day one.
Thanks Needs. How long does it last? I last checked a half hour ago, and will check now.
jkoya
NA2 NSX
Mine does this occasionally, but I've never timed how long the noise lasts....
BluestarE3
Active Member
Yeah, my wife used to tell me the car must be alive because it's breathing heavily when she goes into the garage to do the laundry. I told her to ignore it unless it starts pawing at the door to come into the house. 
Sounds like the BMS (Battery Management System) cooling fan.
CharleyBC
Active Member
A Tesla is never truly off. If memory serves, there was a software release some months back that increased the parked fan noises. It’s trying to dry out the AC condensation so it doesn’t get stinky.
Last February we hosted a crowd at our house, and my wife and I slept on a camp bed in the garage, giving our room to others. Our roommate was our Model 3. It made a variety of clicks, thunks and whirs from time to time all night. Even a sleeping Tesla wakes up and yawns and stretches.
Last February we hosted a crowd at our house, and my wife and I slept on a camp bed in the garage, giving our room to others. Our roommate was our Model 3. It made a variety of clicks, thunks and whirs from time to time all night. Even a sleeping Tesla wakes up and yawns and stretches.
Needsdecaf
Active Member
Runs until the car "goes to sleep". The problem is, however, that while at home, my car doesn't sleep that often as the WiFi keeps it awake. When at work it sleeps fine, but at home, not so much I've given up worrying about it because the vampire drain is pretty slight or the car is plugged in.
The WiFi doesn't matter for sleeping. It probably has to do with the fact it's likely plugged in at home.
Either way, the sound is some sort of coolant or inverter pump if it's from the rear of the car.
Front of the car is where the AC condenser fan noises come from.
My car is almost always awake for 2 hours after every drive. Best I can tell, its how its designed and you can't do much about it.
XLR82XS
D M C
Ditto. They make lots of noises when parked - I don't worry about and get on with my life.
Candleflame
Active Member
that's a bit odd. Even in 40C my car takes I think around 20min.
Really? My car does this every day without fail at work and home. Oddly enough it often times sleeps right away when it’s parked in a parking lot. Is it just the Wi-Fi connection that’s causing it to stay awake or something?
AlanSubie4Life
Efficiency Obsessed Member
Possibly. People report that turning off data sharing and shutting off the WiFi prior to exiting the car (it turns back on if you open the door again) helps vampire drain considerably, so that would be somewhat consistent.
My theory (it's completely unsubstantiated) is that this is the pump providing coolant to the MCU, so that would make sense.
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