Where is the rearview mirror heating switch for the 2021 Buick Excelle?
3 Answers
The rearview mirror heating button for the Buick Excelle is located on the air conditioning control panel, and the rearview mirror heating function is connected in series with the rear windshield defrosting function. It is represented by a square frame with three upward-curving arrows inside. The rearview mirror heating feature 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 the driver 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 button, where simply rotating the knob turns it on. The other is located on the air conditioning control panel, where pressing the heating button activates it. No manual angle adjustment is needed, 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 Celsius. The heat is then distributed across 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. However, if the rain is particularly heavy, the effect may diminish and become less noticeable. Precautions for using the rearview mirror heating function: The principle of rearview mirror heating involves adding electric heating wires to the mirrors, which consume a significant amount of power. When using this function, ensure the car is in an ignited state. Avoid activating the rearview mirror heating while the car is stationary to prevent draining the car battery, which could leave insufficient power to start the vehicle. Other methods for defogging rearview mirrors include: Opening windows for airflow: Crack open the side windows slightly to allow air convection between the inside and outside of the car, reducing the temperature difference and gradually eliminating fog. Adjusting the car's air conditioning to the appropriate setting can also help by blowing hot air to defog the mirrors.
When I first started driving, I was also curious about this. On the 2021 Excelle, the rearview mirror heating switch is actually the same as the rear window defogger button. It's usually located on the center console near the air conditioning controls, with an icon of a rectangle with three wavy lines representing the defogging function. Pressing this button will automatically heat the rearview mirrors to help clear rain or fog, which is especially useful in wet and cold weather. After starting the engine, press it once, and it will work for 10-15 minutes before automatically turning off. The first time I couldn't find it, I checked the vehicle manual to confirm its location and avoid misuse. Remember not to use it in dry weather to prevent overheating and damaging the mirror glass. Safe driving is important, so regularly check that the function works properly to ensure clear visibility. The placement is quite intuitive, within easy reach from the driver's seat.
As someone who has driven for many years, I can share that the rearview mirror heating switch in the 2021 Buick Excelle is the same as the rear window defogger button on the center console. The icon is a square with wavy lines, located next to the air conditioning knob. Pressing it activates the rearview mirror heating, which quickly clears fog in rain or snow for improved safety. Operation is simple: press the button after starting the car, and it works automatically for a period. During routine maintenance, I've checked the fuse to ensure the button responds normally. If the button doesn't respond, it might be a wiring issue or a blown fuse, so prompt repair is recommended. The fixed position makes it easy to find, and its integration with other functions is well-designed. Avoid frequent use on sunny days to save battery.
