I’m also an Arizona resident, and am considering a Opensprinkler install. I’m down in the Queen Creek area. How has your install held up to the extreme heat over the last week or so? My current controller box (a Hunter) is mounted on the outside, west of my home. I have some shrubs that might shade it from most of the direct sun, but I’m still a bit concerned about running into heat issues.
Let me know your experience so far. I have one installed in another state where it is much cooler and inside the garage, and have had very good luck so far.