It’s not happening consistently, but sometimes when I go to run a manual quick run the app says that it’s running and even confirmed that it finished, but the sprinklers never come on. Help!
Do you have a multimeter? If so, I might start by doing a quick run on a zone and when it is not working, measure the voltage. Does it fail, intermittently, for every zone? Is almost sounds like a intermittent connection of the common wire. Here is some information that may help with figuring out what is going on: How to Use a Multimeter for Irrigation | Home Guides | SF Gate
@Lynnortman - did you replace an older irrigation system? By chance is the rain sensor wired in series with the common wire? Or is the rain sensor in the sensor port or not present at all?