Orbit 57606 LCD Display Fading – Can a Replacement Unit Be Wired In?

A 10‑year‑old Orbit Watermaster 57606 shows blurred top‑half digits, works only in manual. The owner bought a replacement 6‑station Orbit unit with a thick black wire and asks if it can be wired to the existing colored wires.

Solution

The black wire is the 110 VAC power cord. To swap controllers:

1. Label each field wire (1, 2, …) and the common (C) as you remove them from the old controller.
2. Connect them to the same terminals on the new controller.
3. Plug the new controller’s power cord into the outlet.

As long as wires are marked and re‑attached correctly, the system will work.