So checking all the electronics, I came with the problem, it was the water flow sensor from the water reservoir, it has three (03) terminals with soldered cables covered with thermal shrinks, two of them were broken, but the thermal shrink doesn’t allowed me to see it. Removed the thermal shrink, re-stripped the cables, slide new thermal shrinks, soldered and it was done. Didn’t kept photographic log of the process, maybe later i’ll do a disassembly guide and point to the details of the repair.