Had Harvey approaching Houston so I set a manual 7 day Rain Delay to avoid problems when/if internet went out. Yesterday I looked at my app and see that I had my lawn watered the day before even though the manually set rain delay had not expired.
So just how does the Rain Delay setting work? Pouring through the zillions of posting here it was suggested by Support that the selected Weather Station didn’t report rain so the system turned on. I thought a manually set Rain Delay would keep the system off regardless of Weather Station reports.
BTW, I’m using a Fixed Days schedule. I have “Disabled” my zones to prevent additional watering while my 30’ of rain soaks in.