Interface Calibration and Repair Services answers when a load cell might need repair. One sign is if the zero balance has shifted significantly since it was first installed. This could indicate that the load cell has been overloaded or damaged. Another sign is if the output varies significantly when the same load is applied. This could also indicate a mechanical issue.If you suspect that your load cell is damaged, you can perform a quick diagnostic check using an ohmmeter. This will help you determine if the bridge circuitry and zero balance are within specifications. If not, then the load cell should be sent to Interface for further evaluation and repair.