The bus is cold, so somebody opens the back windows to let in the hot humid air from the outside. It seems a reasonable method of achieving the goal of warming up the bus, after all, that hot air will pour in and the cold air will be pushed out.
Instead, the bus temperature sensor, which is located at the back of the door registered a warmer temperature and increases the output of the air conditioning.
The result is the bus continues to get colder, while the system continues to register the temperature of the air pouting in from the open window.
So, if you’ve ever boarded a frigid bus and wondered why its so cold – take a look at the back windows and you may have your answer.
Happened to me tonight on a 1-King bus, good thing I had my jacket cause did I ever need it on the bus.