Question
Hi Robert. I have a JH 4000 control timer for my Hunter sprinkler system. The desplay keeps blinking but all zones seem to be functioning fine. I have changed the 9v battery and has not changed a thing keeps on flashing. WHY? I dont have a manual for it as well so if you could guide me in the right direction for either 1 that would be awsome. Thanks in advance.

Answer
Curt,

I have only been in the business since 1999 so I am not familiar with the JH 4000 controller. I was not able to find much information about it online. If you display is blinking but all zones are working then I would leave it be since it is working. I would although realize that once timers start to act up it usually is a sign that they will need to be replaced sooner then later.

Bob