1, check the power supply: if the power supply is insufficient or the wire contact is poor, you can try to replace the power cord or try to change an outlet.

2, check the liner: if the liner is not put in place or poor sealing, you can check whether the liner is put in place, and make sure the seal is not broken or deformed.

3, reset the program: if the program is faulty, you can try to reset the program or restore the factory settings.