Where is the rearview mirror heating function in the Envision?
2 Answers
The rearview mirror heating button in the Envision is located in the air conditioning control area of the center console panel. The button is positioned above the AC button, featuring an icon of a rectangle with three wavy lines. The Envision's rearview mirror heating button shares the same function as the rear window defogger. The rearview mirror heating function is particularly useful during rainy or snowy weather. When activated, the heater behind the mirror quickly warms the mirror surface, gradually removing rainwater or fog, eliminating the need for drivers to manually wipe the mirrors frequently, thereby reducing driving hazards. How to use the rearview mirror heating function: There are generally two ways to activate the rearview mirror heating function. One is combined with the electric rearview mirror adjustment function 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 required, as there is an adjustment button on the driver's side. 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 within a few minutes, typically between 35-60 degrees. The heat is then emitted from the left and right rearview mirrors. Simultaneously, as the temperature rises and evaporates, water droplets on the mirror surface become smaller, and fog gradually disappears, effectively heating the mirror and removing frost. If the rain is particularly heavy, its effectiveness may decrease, becoming less noticeable. Precautions for using the rearview mirror heating function: The principle of rearview mirror heating involves adding electric heating wires to the rearview mirror, which consume a significant amount of power. When using the rearview mirror heating function, ensure the car is in an ignited state. Avoid activating the function while the car is stationary to prevent draining the car battery, which could lead to insufficient power for starting the vehicle. Other methods for defogging rearview mirrors include: Window convection: Open a small gap in both side windows to create air convection between the inside and outside of the car, reducing the temperature difference and gradually eliminating fog. Adjust the car's air conditioning to the appropriate setting to use the hot air blown by the AC for defogging.
Back when I drove the Envision, the rearview mirror heating function was usually on the windshield heating button on the center console, typically marked with a square-shaped icon. On rainy or foggy days, this feature was super handy—just a press, and the mirrors would automatically warm up to clear the fog, making the driving view much clearer. I remember using it often during winter rush hours, which made driving a lot safer. Compared to other cars, Buick designed it quite user-friendly, placing the button right in the air control section, not too hard to find. If you can’t locate it, first check if the button is turned on—some models automatically activate it when temperatures drop. Also, don’t mistake it for the door controls; those are for electric mirror adjustments. During regular maintenance, give the mirror surfaces a quick wipe to keep them clean, which helps the heating work better. Overall, it’s simple to use, whether you’re a newbie or a pro, and ensuring driving safety is what matters most.
