After you turn off the heater switch, the temperature of the engine will rise, because the water in the engine will circulate through the heater water tank when the heater is turned on, so the heat dissipation is good and the water temperature will not be high. But it will affect the refrigeration effect of air conditioner.
Turn off the warm air, the water temperature will rise, so the electronic fan will run, and it is normal for the fan to do some exercise to reduce the engine temperature. In summer, the engine temperature is about 80 degrees, as long as it does not exceed 90 degrees, that is, as long as the water tank does not boil.