Why does the fog inside the dashboard persist and not disappear?
4 Answers
The main reason why the fog inside the dashboard persists and does not disappear is that the car glass is in contact with the outside environment, where the temperature is lower, causing the water vapor inside the car to condense on the glass. Below is relevant information about the dashboard: 1. Introduction: The dashboard is a rigid flat plate or structural component used to install instruments and related devices. It can be categorized by type into screen-type dashboards, frame-type dashboards, channel-type dashboards, and cabinet-type dashboards. The dashboard can come with external lighting and may also include an attached control console. It comes in various forms and specifications, allowing for the installation of different instruments as needed, or the combination of various dashboards into a single unit. 2. Types of indicator lights on the dashboard: door status indicator, parking indicator, various dashboard indicators, battery indicator, fuel indicator, washer fluid indicator, electronic throttle indicator, front and rear fog light indicators, turn signal indicators, high beam indicator, seat belt indicator, O/D gear indicator, recirculation indicator, width indicator, VSC indicator, TCS indicator, etc.
I've also encountered the issue of persistent fogging on the dashboard, especially during the humid spring season. This is mainly because moisture has seeped into the interior of the dashboard, which isn't completely sealed. If your car is several years old, the rubber seals may have aged and hardened, creating gaps that allow moisture to enter after rain or car washes. Another reason could be incorrect airflow direction from the AC system or poorly designed vent angles, causing hot and cold air to converge near the dashboard glass. Later, I took it to a repair shop where the mechanic disassembled the dashboard and found hardened sealing rings. Replacing them solved the problem. He also advised me to park the car in a dry, well-ventilated area and reduce the frequency of car washes to help with dehumidification. Additionally, turning on the defogger and blowing cold air onto the windshield after starting the car can help balance the temperature difference.
After years of car repair experience, persistent fogging on the instrument cluster is a common issue. The main cause is compromised internal sealing, allowing moisture to seep through gaps in the dashboard. Beyond aging seal strips, improper installation during aftermarket device upgrades—like dashcam or navigation system installations that required dashboard disassembly—can leave seals improperly compressed upon reassembly. Additionally, significant temperature differences between the car's interior and exterior may lead to condensation buildup inside. Solutions vary by root cause: typically requiring dashboard disassembly to inspect and replace seals, with severe cases necessitating fresh sealant application. DIY attempts are discouraged due to risks like damaging instrument pins; professional servicing is safer. For prevention, ensure proper ventilation post-car wash and use interior moisture absorbers to mitigate humidity.
I've checked the car manual, and there are usually several reasons why dashboard fogging won't clear. First, when humidity is high, moisture can seep in through the edges of the seals, especially in older vehicles where the sealing material has lost its elasticity, exacerbating penetration. Second, design flaws in certain car models can lead to poor air circulation, causing moisture to accumulate inside the dashboard with no way to escape. Additionally, improper disassembly during aftermarket center console modifications can also compromise the seals. You can try these solutions: turn off the air conditioning before parking to prevent condensation, use specialized dashboard defogging sprays to reduce water droplet adhesion, or place silica gel desiccant packs around the dashboard to absorb moisture. However, the fundamental solution is to inspect the sealing structure.
