Question
My house has a 5 zone irrigation system: TORO EL-6+  recently when I turn on any zone, water from zone 2 always turn on at the same time, so I have 1&2 on, then 2 on, then 2&3 on, then 2&4 on, then 2&5 on. Can you tell why ? Even if 2 is completely off (on EL-6+), but when I turn on zone 1 or 3 or 4 or 5, water from zone 2 will come out... Can you help ? Really appreciate... Thanks

Answer
It is probably a problem with the circuit board on the controller.  Try cleaning it by blowing the back of the circuit board off with one of those cans of air used to clean electronics.  I would avoid using any liquid or wiping it.  You can use a soft brush to remove spider webs.  If this does not work, I would suggest replacing the controller.