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Which Button is the Rearview Mirror Heater?

1 Answers

Jesse

07/29/25 9:19pm

The rearview mirror heater button is typically marked with a rectangle containing three upward-curving arrows. The car's heating button activates electric heating wires embedded behind the mirror to reduce moisture, fog, and frost on the front and rear windshields and exterior rearview mirrors, thereby improving the driver's visibility and ensuring clear mirror surfaces. This enhances driving safety. Methods to activate the rearview mirror heating function: There are generally two ways to activate the rearview mirror heating function. One is combined with the electric mirror adjustment button—simply rotate the knob to turn it on. The other is located on the air conditioning control panel—press the heating button to activate it. No manual angle adjustment is needed, as the driver's side has adjustment buttons. Principle of the rearview mirror heating function: After pressing the button, the electric heater behind the rearview mirror glass rapidly heats up to a fixed temperature (usually between 35-60 degrees Celsius) within minutes. The heat is then emitted from the left and right rearview mirrors. As the temperature rises and evaporation occurs, water droplets on the mirror surface gradually shrink, and fog slowly dissipates, effectively clearing frost and fog from the mirror. However, in heavy rain, its effectiveness may diminish and become less noticeable. Precautions for using the rearview mirror heating function: The principle of rearview mirror heating involves electric heating wires on the mirror, which consume significant power. Ensure the car is running when using this feature to avoid draining the battery, which could prevent the car from starting. Other methods for defogging rearview mirrors include: Opening windows slightly to create airflow between the inside and outside of the car, reducing temperature differences and gradually eliminating fog. Adjusting the car's air conditioning to the appropriate setting to blow warm air for defogging.

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