Fans running excessively while charging

[Vzx]

My 2022 4S has been running the fans more aggressively and blowing hot air out of the driver side wheel well vent since the new PCM uPdate. Didn’t have loud fans prior to update.

It makes my garage very hot and stuffy 2-3 hrs after charging has started. I’m charging after 7 PM so it’s not like the garage or ambient temps are too high.

not sure if it is my car or every other Taycan. My Tesla model S usually has fans kicking only when supercharging. Otherwise it is very quite while home charging.

on general charging profile
Set to 80% max
Optimized charging on
48 amp charging (11kw) at 240v
No other timers.

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[Jayyvr890]

If you're mostly charging overnight, do you really need 11kw? I have noticed that if I dial down the amperage, the fan works a lot less to none at all.

 

[Lee808]

My GTS does the same. It’s alarmingly loud at times.

 

[Vzx]

If you're mostly charging overnight, do you really need 11kw? I have noticed that if I dial down the amperage, the fan works a lot less to none at all.

is there a setting in the PCM where I can dial it down? Changing it on the EVSE is probably an option but I would rather keep it at 48 amps there for quickly charging the Tesla.

my Tesla EVSE is currently set to 48 amps (on a 80 amp circuit). I need to charge at 11 kw on some days because my wife needs to charge her Tesla after my Porsche is done.

 

[02bluesuperroo]

It’s probably a change they made because they’re having problems with chargers failing and other electrical system issues.

That said, I have a 2022 and I haven’t noticed much of a difference before and after the update. However, I have the 19.2 kW charger and the fans are always blowing when it charges.

I could really invest in an EVSE that has adjustable amperage because mine does not and it always charges at 17 kW/hour. I haven’t found any way to limit it within the PCM.

 

[JimBob]

Garage temps can easily get 10 degrees hotter than air temperatures so in Florida could be over 100F. Your car will need to work harder to remove the heat from charging. I live in a cooler area and have never seen over 85F.

 

[Jayyvr890]

Not into the PCM but you can usually reduce the current on the EVSE.

 

[satchurator]

I could really invest in an EVSE that has adjustable amperage because mine does not and it always charges at 17 kW/hour.

@02bluesuperroo What make/model of EVSE do you have?

 

[02bluesuperroo]

@02bluesuperroo What make/model of EVSE do you have?

I have a Watzilla Wall Wattz 75A

 

[satchurator]

I have a Watzilla Wall Wattz 75A

You should reach out to Frank Gangi at WattZilla. Their products are based on OpenEVSE, maybe there is a way to dial it down…

 

[Vzx]

I will dial down the Tesla EVSE to 32 amps (from 48 amps) and see if there is any change in the fan noise

love the Taycan but wish they made it easy like the Tesla software where I could change charging amps on the fly within the car.

 

[Scandinavian]

I have not experienced any change when charging at home with 11 kW since the uPdate.

However at Ionity charging. (263kW) I have noticed the fans running much faster and louder.

Left the car on an Ionity charger in Sport Plus mode and when I returned the car sounded like a jet waiting to take off! The fans were screaming and people had flocked around the car to see what was going on?

 

[Bill33525]

Kyle Conner OSR says the fans run faster when the car is in Sport mode in preparation for more spirited driving.

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