1. Abnormal sound of glass vibration. This indicates that the glass lifter screw may be loose, the solution is to tighten the lifter screw;


2. The glass lifter is stuck. The cause of this failure may be the deformation or damage of the glass mud trough, the loosening of the fixing screws of the lifter, the deviation of the installation position of the guide rail, or the damage of the glass lifter. The maintenance method is mainly to clean/replace the glass mud trough or loosen the glass mounting screws to adjust the glass position.

3. All the glass lifters cannot work. The cause of this failure may be that the ground wire of the combination switch is off, the main power line is off, the relay is poorly contacted, damaged, or the lock switch is poorly contacted or not closed. The repair method is to check and repair the circuit.