Question
Have an underground system installed about 4 years ago.  Everything has worked well until yesterday.  I was running it manually.  When I went to start yesterday there was an err message and it showed the sprinkler on.  Can you give me some advice?

Answer
Hi Wilma,

Thats means you have a bad solenoid, the error msg should have a number, it points to the valve number, locate it at the box, see the wire color, look at the valve box for the same wire color and replace the solenoid.
Regards
Guillermo