How to determine the failed controller E01: communication failure, sensor failure; E02: you'd better test the motor first to check if there is any problem with motor, if motor work normal, then need to change controller. E03: Sensor fault; treadmill will run few seconds then show E03; E04: usually over-current fault, this situation is generally burned components on the controller; E08: May be lift motor control fault. The control boards are available in various models and are identical in appearance.Please check the model number by the label on the back of the control board to make sure it’s correct. Quality Motor Control: Equipped with a sophisticated motor control system, ensuring smooth and efficient operation. Durable Construction: Built with high-quality components for long-lasting performance and reliability. Pls noted, this controller have serveral types. Pls send us a photo of your original/old board for confirmation before place an order, thank you! Energy efficiency : Energy efficient design to minimise power consumption and running costs. Safety in use: safety mechanisms such as overcurrent protection and thermal shutdown ensure greater safety. Color green Material Aluminum Brand Name Generic Model Name B056D-110v Manufacturer GYM Enginner Package Weight 16 ounces Suggested Users unisex-adult Included Components control board Warranty Description 90 days warranty. Item Package Dimensions L x W x H 8 x 6 x 5 inches