Submitted by Concestor0 on Sat, 2020-03-07 16:51
Our coolant pumps continue to run for at least 2 hours after parking the car. I imagine that this has something to do with cooling the battery and power unit between drives but during the winter, when we're doing all we can to keep the battery warm, the car is still trying to cool itself.
I did a little testing this morning using the ScanMyTesla app and found that the battery cools over three times faster when the pump is running then it does after it enters the "sleep" mode. Considering that the batteries need to be kept warm to get normal capacity and regenerative braking this seems like it would make sense for the pump to only continue running when it's warm outside.