I think root cause is cheap weight sensors in the 4 feet.
A few years ago the scale was unable to calibrate, or it wouldn't detect me stepping off, or stepping on, or it would randomly turn on and waste power for hours.
I took it apart, cleaned the feet, and saw that some of them were very worn, which is a problem since somebody decided to make a critical part, meant to flex thousands of times, out of 1/32 thick plastic. Definitely a start-up move, maybe a software writer designed the hardware? Anyway, I swapped pieces around, cleaned it, and it worked for a few more years.
This last year is started getting flaky, killed batteries in a week, etc. I took it apart, cleaned it, put it together, it still complained a lot. It killed the batteries, I changed them and now I just get the ERR message. If I ever get bored enough I'll take it apart and measure all the weight sensors with a an ohmmeter as I suspect 1 or more of them has shorted out or otherwise failed. Normally this would be a replaceable part, but I have a feeling that's not the case this time.
RIP Aria 06/10/2013 - 02/07/2022
PS: what idiot at Fitbit doesn't know the definition of the word "all?" I just had to scroll down, click "show more," scroll down, click "show more" almost 100 times after clicking "show all data" when trying to find out when I first got the Aria. Did they offshore the entire site design to somewhere with no English speakers? Dear Fitbit: 1 little thing being a PITA happens. Every little thing being a PITA speaks very poorly of corporate culture.
