What Causes the Window to Shake When Descending but Operate Normally When Ascending?

[Daedalus]

The reason why the window shakes when descending but operates normally when ascending: It may be due to dust and foreign objects in the window guide channel. The specific maintenance for car windows is as follows: 1. Regularly clean the lifting channel: During rainy or snowy weather, the conditions are harsh, and sand and dust can be blown into the slot under the window glass. If the sediment in the lifting channel is not cleaned in time, over time, it will increase the friction resistance between the window glass and the lifting channel, affecting the normal operation of the window. 2. Close the windows during rain: Remember to close the windows when it rains; otherwise, rainwater may drift into the car, wetting the electric window switch and causing a short circuit. 3. Use glass cleaner for cleaning: When the car is driven outside for a long time, the windows will naturally get dirty, reducing transparency. At this time, it is necessary to use glass cleaner to remove dirt from the windows. However, it is important to note: Never use dishwashing liquid as a cheap substitute for glass cleaner, as it can be corrosive to the window glass over time, potentially damaging the car. 4. Apply window film: During the high temperatures of summer, prolonged exposure to the sun can cause the car's leather seats, dashboard, and center console to crack or become unglued. Therefore, it is necessary to protect the car from the sun. You can apply heat-insulating film to the car windows to block sunlight and effectively reduce heat.

[LeVera]

My friend's car window has been shaking violently when rolling down recently, but it's smooth when going up, which reminds me of my car repair experience. The most common cause is excessive dust or sand particles accumulated in the track groove, causing the glass to get stuck and shake when descending; when ascending, the electric motor has more power and can forcefully pull it up normally. Sometimes, deformation or aging of the track itself can also cause this. Try checking it yourself: first turn off the power, clean the guide rails on the door edge with a clean cloth, then spray some window lubricant. If it still shakes, you'll need to take it to a professional repair shop to avoid prolonged issues like cracked glass or a broken window regulator. Regular cleaning can prevent this problem, especially in rainy or dusty areas where such malfunctions are more likely to occur.

[MacLillian]

My old Accord's window was shaking annoyingly when rolling down recently, but it was fine when going up. The mechanic said it's due to a loose regulator cable—the steel wire stretches over time, causing the glass to wobble when descending; whereas the ascending cable stays taut and stable. This thing is hidden inside the door panel, requiring disassembly to tighten or replace, potentially costing a few hundred bucks. Now during maintenance, I always remind myself to watch out for unusual noises, since faulty window mechanisms can easily scratch the seals, especially worsening in summer. Better fix it early to avoid getting stuck when urgently needing to roll down the window outside—that'd be truly miserable.

[PaulRose]

The window shakes when rolling down but operates smoothly when rolling up, most likely due to obstructions in the door guide rails—such as accumulated dirt or scratched tracks, causing the glass to jerk when descending; the stronger upward force allows it to slide past. It could also be caused by hardened or aged sealing strips squeezing the glass. Simple cleaning of the rails or applying lubricant might help, otherwise, the window regulator mechanism needs inspection. This issue is common in older vehicles or dusty environments.