Why can the Roewe 550 window regulator only go down but not up?

[LaAiden]

Roewe 550 window regulator can only go down but not up due to: aging, excessive dirt, or deformation of the window seal causing resistance to the window's upward or downward movement. The window regulator is the mechanism for raising and lowering car door windows, mainly divided into electric window regulators and manual window regulators. Electric window regulators mostly consist of a motor, reducer, guide rope, guide plate, window mounting bracket, etc. The Roewe 550 is equipped with a TST 6-speed oil-cooled dual-clutch automatic transmission system, Inkanet 3G digital intelligent network driving system, Start-Stop digital intelligent start-stop energy-saving system, EPB digital intelligent electronic parking system, and Configurable color-customizable digital instrument cluster system.

[DiCole]

I had a similar issue with my Roewe 550 before – the window could roll down but not up, which was really annoying. First, check if the main driver-side control button has poor contact, since it's the most frequently used button. Next, inspect whether the lift motor is stuck or burnt out, especially after rainy days when aging rubber seals increase resistance, which is particularly hard on the motor. Another possibility is small stones or debris stuck in the window track, requiring door panel removal for cleaning. Wiring issues shouldn’t be overlooked either, such as damaged or broken wires near the door hinge area. In my case, it turned out the control module was damp, and I ended up spending over 300 yuan at the dealership for a replacement. If you’re fixing it yourself, remember to disconnect the battery first. Also, the door panel clips are very fragile, so I’d recommend buying a new set of clips in advance.

[SimonDella]

As a frequent visitor to auto repair shops, I recommend troubleshooting from three aspects: First, check for physical obstructions by inspecting the window gap for any foreign objects or hardened rubber seals. Try spraying some dashboard wax several times as a quick fix. For the electrical circuit, focus on checking whether the corresponding numbered fuse in the fuse box (refer to the manual for its location) has blown. On the control side, the most likely issue is oxidized contacts in the switch assembly. You can temporarily solve this by disassembling it yourself and spraying WD40 on the button base. If the problem occurs after rain, there's an 80% chance it's due to water ingress causing a short circuit in the wiring harness connector. For models with anti-pinch functionality, there's another pitfall—if initialization data is lost, the system needs to relearn. The reset method involves holding the switch for ten seconds during window roll-up until you hear a click at the bottom, indicating a successful reset.

[GeorgeLee]

I've experienced one-sided window malfunctions twice. The first time was due to a broken nylon gear inside the lift motor - symptoms included hearing the motor spinning when pressing the window up button but the glass wouldn't move. The second case was more subtle with a seized limiter, requiring door panel removal and prying with a screwdriver to free it. Loose glass bracket screws can also cause tracking misalignment, detectable by noticeable play when shaking the glass by hand. The most cost-effective approach is first measuring voltage at the switch output - 12V indicates the issue lies with the motor or mechanical components. For older vehicles, directly replacing the complete assembly is recommended, with OEM motors around 600 yuan and aftermarket ones over 200 yuan, though aftermarket units tend to develop noise issues. Remember to apply white lithium grease to cables during repairs to reduce wear.

[PatrickRose]

Common causes include: a short circuit to ground in the door panel wiring harness triggering overload protection, which can be detected by measuring resistance with a multimeter; burnt microswitch contacts in the window switch preventing signal transmission, visible as black oxidation points upon disassembly; a dislodged pulley in the window regulator bracket causing cable entanglement; and a rare fault in the door lock linkage module—windows get forcibly locked when central locking status is abnormal. Remember to first try resetting the ECU by disconnecting power, holding the window-up button on the key fob, then restoring power. Those with aftermarket audio should pay special attention to whether wiring bundles have damaged factory harnesses. If unresolved, use a diagnostic tool to read fault codes from the passenger-side door module, located beneath the door panel storage compartment.