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HELP - fans running constantly overnight

Couscous19

Member
Jul 13, 2017
20
8
London
I unplugged my car around 11 p.m. yesterday and it was making a humming or whirring noise. Looking online it sounds like this is the car sucking in air to cool the battery. Seemed odd to me given that it’s only ~14 Celsius in the evening here but if it stopped soon then whatever.

I checked the car again around 10 a.m. today and it had lost 4% battery in those 11 hours, with the fans still humming away.

Does anyone know what I should do? Not sure if it’s a problems with the fans incorrectly thinking that the battery is hot or if there’s a problem causing the battery to get hot despite it not being used and the ambient temperature being cool.
 

Jellus

Member
Jun 4, 2019
152
147
Scotland
Was the car locked properly? Could have been the climate control left running. Happened to me once when I walked away from the car without the rear trunk being properly closed, but thankfully I spotted it soon enough.
 
  • Helpful
Reactions: Roy W.

Couscous19

Member
Jul 13, 2017
20
8
London
Was the car locked properly? Could have been the climate control left running. Happened to me once when I walked away from the car without the rear trunk being properly closed, but thankfully I spotted it soon enough.

Good tip but not the case unfortunately. No climate control on when we got back yesterday and even check to make sure it was off this morning.
 

Tony Hoyle

Active Member
May 7, 2019
1,112
677
Stockport, UK
Mine was going off all day yesterday due to winter sun. It stopped overnight though.

I'd hate to think the noise the ones in the US make in real heat.. they must sound like a fleet of hovercraft.
 

mswlogo

Well-Known Member
Aug 27, 2018
6,123
4,736
MA, NH
Is Sentry Mode on? That will prevent car from sleeping. Also be careful with apps. Cabin cooling can also keep it running.
 

Couscous19

Member
Jul 13, 2017
20
8
London
I stopped the fans getting carried away. Fix in case anyone else needs it in the future:

Via the Tesla app on my phone I turned the AC on and set the target temperature to 16 Celsius so it would blow cold air. After 20 seconds of that I changed the target temperature to 20 C so it would blow hot air. After another 20 seconds I turned off the air conditioning. I then went outside to the car and the whirring has stopped.
 
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Reactions: -DB-

Fullerene

Member
Jul 31, 2019
372
395
Dorset, UK
Glad this is resolved, hopefully permanently. However, this doesn’t exactly fill me with confidence, would be good to understand what was going wrong to need this workaround. Either a hardware fault or a software bug.

Hope you reported this to Tesla as a bug & to Service Centre, then at least it gives them the opportunity to gather data & determine root cause.
 

zayn

Member
Jun 3, 2019
415
121
London
which model ?


I unplugged my car around 11 p.m. yesterday and it was making a humming or whirring noise. Looking online it sounds like this is the car sucking in air to cool the battery. Seemed odd to me given that it’s only ~14 Celsius in the evening here but if it stopped soon then whatever.

I checked the car again around 10 a.m. today and it had lost 4% battery in those 11 hours, with the fans still humming away.

Does anyone know what I should do? Not sure if it’s a problems with the fans incorrectly thinking that the battery is hot or if there’s a problem causing the battery to get hot despite it not being used and the ambient temperature being cool.
 

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