Question
Hi,  I recently noticed that our Rainbird ESP Modular was not running zones 1-2 (rotors), but was running zones 4 and 5 (sprays). The transformer is plugged into a working outlet, display looks normal. The system is connected to a remote sensor with an antenna on it, located right next to the control panel (outside there is a rain sensor) I tried running it with the sensor bypassed to see if it makes a difference but it does not. I also noticed that there is a small white wire that enters the inside panel from the sensor wiring that is not connected to anything. Some of the zones do work but the rotors do not. Any ideas? Thank you

Answer
Hey steve, i would suggest hooking the wire that is loose up to the C (common) terminal. Basically the common wire would run to a series of valves that are all hooked up to a common wire. If the common wire is not hooked up, cut, etc. then none of the valves that this common wire runs to would work. The valves that are working probably have a different common wire running to them. Good luck and have a great day.