Load cell temperature drift

[ambiani]

Hi,

I have a strange problem using 4 load cells (50kg type) and an NodeMCU.
I'm using this combination to measure the level of liquid in a 25l container (pool management).

During the day when temperature rises, the weight measurement drops (from 10kg when cold to 1-2kg when hot). The temp difference is about 20deg.
The strangest thing is that I have a 2snd identical scale, same hardware, same code (tasmota) right next to it to measure a 2nd container and that scale doesn't have this problem.
Am i dealing with a faulty load cell, can this be a wireing issue? Or is this calibration?

[gilshultz]

Try swapping parts one at a time. When the problem moves to the other unit you have found the problem board, next I suggest getting a new one and see if that solves the problem unless you have the resources to test and repair it.