What is the most fuel-efficient temperature setting for car air conditioning?

1 Answers
AlanMarie
07/29/25 10:00pm
Setting the car air conditioning to the 4th gear is the most fuel-efficient. Here is the relevant information: 1. Fan speed knob: The fan speed knob only adjusts the speed of the fan, and the fan runs on electricity. For a normal car, once the engine starts, the generator is always in operation. Therefore, it does not affect fuel consumption. 2. Function of the red-blue knob: It controls the proportion of cold and hot air intake valves. Turning it to the red side opens the hot air intake valve, while turning it to the blue side opens the cold air intake valve. This function is similar to the mixing valve of a household water heater. The rotary knob should also be connected to a time-delay relay.
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