We are fairly new to TV. We've been here 6 weeks. Our first water bill was nearly $300.00 (We realize part of this is our amenity fee.) We program our system to water once a week, but will come home on an evening it's not suppose to be on and find it watering the yard. We've had the irrigation people here 4 times checking our system and they say there is nothing wrong with it!! Apparently, regardless of what amount of time we set it to run, it resets itself every night at midnight, based on humidity and the amount of rain we've had. Our system runs 3-1/2 to 4 hrs each time it comes on!