u/GreenIce2022

I recently completely rebuilt a sprinkler system that a customer had installed from another company. The previous company installed an FG100 Rainbird flow sensor.

When I do the learn flow rate function through the controller or the app, it just shows zero GPM. I checked the wiring and it's correct. As part of the renovation, I had to run all new electrical wiring in the field so I know the wiring is intact. Any other ideas for what to try? Thank you!