There may be many reasons why the solenoid valve is not working, such as circuit failure, damage to the solenoid valve, control system failure, etc. It is recommended that you first check whether the circuit connection is normal. If there is no problem with the circuit, you may need to replace the solenoid valve or repair the control system. If necessary, you can also contact the gaogeng after-sales service department for consultation and repair. In addition to the above reasons, the solenoid valve not working may also be related to the supply voltage, oil circuit blockage, etc. If you need more detailed solutions, you can contact the COGENG after-sales service department, and they will provide you with professional technical support. In addition, maintaining and maintaining the excavator can also effectively prevent and solve similar problems. Regular maintenance and inspections are recommended. Care and maintenance of the excavator include regular replacement of lubricating oil and filters, inspection of oil lines and electrical connections, etc. These measures can help extend the service life of the excavator while also identifying and solving potential problems in a timely manner. You can also consult the Gaugen after-sales service department for more advice and guidance on care and maintenance. In addition to regular maintenance, you should also pay attention to operating specifications when using the excavator to avoid damage caused by overload use, collision, etc. In addition, excavators also need regular inspection and maintenance of key components such as hydraulic systems and engines. If you have any questions about the use and maintenance of your excavator, you can contact us at any time and we will try our best to help you.