Why is the Volkswagen rearview mirror heating not working?
2 Answers
If the rearview mirror heating in a Volkswagen is not functioning, the first thing to consider is whether the outdoor temperature is too high. If the temperature is not the issue and the rearview mirror heating still doesn't work, it is advisable to seek timely inspection and repair. The rearview mirror heating function refers to the ability of the rearview mirror to be heated via electric heating wires embedded behind the mirror when driving in rainy, snowy, or foggy weather, ensuring a clear mirror surface. Below is an introduction to the rearview mirror heating function: 1. Suitable conditions: The rearview mirror heating is most useful during rainy or snowy weather. When activated, the heater behind the mirror quickly warms the mirror surface, gradually removing rain or fog from the mirror, eliminating the need for the driver to manually wipe the mirror frequently, thereby reducing driving hazards. 2. Principle: An electric heating element (heating film) is installed inside the mirror of both rearview mirrors. In rainy or snowy conditions, when the driver activates the rearview mirror heating function, the heating element rapidly heats up to a fixed temperature within a few minutes, typically between 35-60 degrees Celsius, thereby heating the mirror to remove fog and frost.
A couple of days ago, the rearview mirror heating in my Volkswagen had the same issue—pressing the button didn’t generate any heat at all. Based on experience, don’t rush to blame the function itself; it might just be a blown fuse. Volkswagen’s fuses are usually hidden in small boxes near the interior trim panels—check the manual to locate it and try replacing it with a new one. If that doesn’t work, the heating element inside the mirror might be faulty, especially in humid weather where moisture can seep in and cause a short circuit. Another possibility is poor contact in the switch button, making it unresponsive. Loose wiring connections are also a common issue—older Volkswagens often develop loose plugs over time. Once, I accidentally nudged a wire while changing a bulb myself. My advice: check it before cold weather hits—don’t wait until rainy or foggy days when it becomes a hazard. A visit to a proper repair shop won’t cost much for minor fixes, but safety comes first.
