The twin fans are controlled, most of the time it only runs one the second kicks in if needed and they are connected to the second battery probably because it was that side things mounted on and will actually run still once the ignition is off if hot.
As for the traffic there was a truck in front but I expect it to idle not moving with the aircon and stay normal. The thermostate should be new but will be checked in the process.
The water pump??? was something I was wondering about given the coolant alarm was sounding on the second drive after the incident yet the coolant level is ok. What evers going on its been an early worning because driving around in the hotter part of the day without the aircon on the gauge wont move of normal.
