How Does the Power Windows Anti-Pinch Safety Feature Work?

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Closing your power window is as easy as pressing or pulling on the window switch until your window reaches the top. It only takes a few seconds to close the window, but those few seconds take the driver’s concentration away from the road. It is becoming increasingly common for power windows to have an express-up function so the driver can press the power window button and the rest of the process is automatic.

The danger of the power window express-up feature is if there is an obstruction preventing the window from closing all the way. It can cause damage whether that obstruction is:

  • A child’s arm, head or toy
  • A chunk of ice or snow
  • A piece of dirt or a stone stuck in the window track

When the window reaches the obstruction, it can cause bodily harm or the window can shatter if the obstruction is hard. To add a safety device to the express-up feature, car makers use an anti-pinch device. The window motor has a pressure sensor that detects window motor movement when the glass has stopped moving, even minutely. If this occurs, the window reverses direction and moves downward.

The anti-pinch feature is controlled by a small module which is now often integrated into the power window switches on the driver’s door. If the vehicle loses battery power or the power windows require a repair, the power windows will not know their upper and lower limits. The window motor will need to be re-trained so it can learn the window travel limits.


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Number of Reviews

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Phillip

18 years of experience
224 reviews
Phillip
18 years of experience
Saab 900 - Window is not working - Roseville, California
Even though it was really hot out he was very patient and thorough in his assessments. He explained everything in detail and was very knowledgeable.
Mazda MPV - Window is not working - Davis, California
Great guy who really made sure everything the car needed got done the right way. Wouldn't hesitate to follow up with him if or when future work is needed. Highly recommended!

Joel

20 years of experience
766 reviews
Joel
20 years of experience
GMC Yukon - Window is not working - Ponte Vedra Beach, Florida
Joel was genuinely nice, very professional and seems to be very experienced. I trust his knowledge and trust him to work on my auto.
Ford F-150 - Window is not working - Jacksonville, Florida
Joel found the problem right away and fixed it as well as informed me of other repairs that need to be done to the window and made great suggestions that saved me money!

Mazyar

7 years of experience
171 reviews
Mazyar
7 years of experience
Volvo V70 - Window is not working - Morrow, Georgia
Very personable . Responded with courtesy to all my questions. Did an excellent job explaining the problem. I was very satisfied with this mechanic.

Damian

10 years of experience
414 reviews
Damian
10 years of experience
GMC Yukon - Window is not working - Groveland, Florida
Damion was excellent he knew what the issue was before he took of my door panel went right to the piece that was left out

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