Question
I have a Rain Bird ESP-LX and recently it started running practically all the zones
at the same time, even if I try to run a single zone separately.  How can I fix this?

Answer
Hi Inda

Check the timer programming make sure you don't have overlap programs. Let only one program like A.

Try opening one valve manually, if all opens you have to clean the valves and or replace the selenoids.

You can go to www.irrigationtutorials.com to find out how to do this.

Regards
Guillermo