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What is the reason for the malfunction of the left front window of the new Focus?

3 Answers
LaEmilio
08/26/25 4:48am
The malfunction of the left window lift in the new Focus may be caused by a faulty window regulator or control circuit. It is recommended to visit a repair shop for troubleshooting and repair. Below is more information about the window lift: 1. Car window lifters use very flexible connecting rods to lift the window glass while keeping it in a horizontal state. A small motor is connected to a worm gear and several other spur gears to produce a large gear reduction ratio, providing sufficient torque to lift the window. 2. An important feature of power windows is that they cannot be forcibly opened. The worm gear in the transmission structure supports this function. Due to the contact angle between the worm and the gear, many worm gears have a self-locking feature.
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RafaelRose
09/08/25 6:26am
I've encountered similar issues before. The left front window failure in a new Focus is usually caused by several common problems. The most frequent issue is a faulty window motor, which may burn out after a few years of use, resulting in no power to raise or lower the glass. Damaged switch buttons are another significant cause - poor contact or aging internal components can make the window unresponsive when pressed. Wiring problems shouldn't be overlooked either, such as broken wires or loose connectors, especially in areas prone to wear like door seams. If the fuse blows, it cuts off the current, and you can check the corresponding position in the vehicle's fuse box. Another possibility is foreign objects stuck in the window track, like accumulated leaves or dust, causing difficulty in operation. My car had this exact problem before - it was quite troublesome when I couldn't close the window during rainy days. I'd suggest checking the switches and fuses yourself first, and if that doesn't work, take it to a professional repair shop for a thorough fix.
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JeffreyLynn
10/22/25 6:32am
My new Focus also had a left window failure, with issues often stemming from electronic systems or mechanical components. A damaged window control motor can paralyze the entire system, especially prone to overload with frequent use. Another key factor is switch failure, where buttons on the driver's side or door handle have poor contact or completely break down. Wiring faults like short circuits or broken wires disrupt signal transmission. Blown fuses are also common, particularly when the circuit is overloaded. If the window gets stuck halfway, debris in the tracks might be the culprit—spraying some lubricant may offer temporary relief. Sometimes these problems relate to the car's onboard computer, as modern vehicles feature module control, though this is rare. I usually have a mechanic conduct a thorough inspection to avoid safety risks by not delaying repairs.
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