Since your scale is new, the issue is rarely wear-and-tear. Instead, it is usually related to setup or environment:
If the signal is interrupted or the sensors cannot get a stable reading, the internal processor throws Error 7. Common Causes for Error 7 on New Scales tanita scale error 7 new
On most Tanita devices, is a generic "Measurement Error." It occurs when the scale is unable to complete the Bioelectrical Impedance Analysis (BIA)—the process where a safe, low-level electrical signal passes through your body to calculate body fat, muscle mass, and water percentage. Since your scale is new, the issue is rarely wear-and-tear
Tanita scales are incredibly sensitive to balance. If the scale is on a carpet, the sensors will fail to register your weight accurately, leading to a calculation error. Tanita scales are incredibly sensitive to balance
Here is a comprehensive guide to understanding what Error 7 means and how to resolve it. What Does "Error 7" Actually Mean?
Most new Tanita scales come with a 1-year to 3-year warranty. Keep your receipt and contact Tanita’s customer service department; they frequently replace units that show persistent communication errors right out of the box.