Tesla Motors Club
Even those Phoenix guys have never heard AC compressor screaming when vehicle is left baking in the sun.
If AC compressor (with condenser fans) is not running, cooling is NOT possible. Glycol loop doesn't have a fan, therefore
there is no cooling happening even if glycol pumps are running. Can't cool 45C pack with 45C air even if S/X had a fan.
One glycol pump is activated while AC charging. It is for onboard charger. Dumping energy. Into that radiator that doesn't have a fan.
Theoretically, Tesla could cool the pack when parked. But it doesn't in real life. It appears there is no reason. If temperature is more than enough (let's assume 55C or 60C) it will do cooling while driving/supercharging. And that doesn't allow temperature to EVER tip the preset level (SC speed or acceleration will be limited, this has been confirmed). As soon as one stops drag racing or supercharging, heat generations stops and so does cooling. Pack will be at that border case temperature and will passively cool if left parked for hours. In case of record high temperatures like 130F, it will just NOT cool. That's also fine.