The number of heads per station really doesn't come into the hydraulic equation so much as the size of the nozzle installed in the head. Different sized nozzles and different PSI's at the head determine the GPM of the zone/station.

ff, You didn't mention if this is a new controller, installed by you or a contractor. Hunter does try to help you with your problems. Let us know what you find out. Link to Hunter support: http://www.hunterindustries.com/support/?f[0]=im_field_customer_type%3A61&f[1]=im_related_product%3A241 Contact info: http://www.hunterindustries.com/contact-us Aloha

The inside panel will pop out from the case. Unplug the wire connector and push the pins and it will pop right out. Hunter is pretty good about their warranty if its anywhere around 1 year old. If you don't have the instruction manual, go to thier website.

I would try to reset the controller. This is listed in the manual as to how to do it, you need a tiny point like a pencil eraser end to press down on the little button inside the box, follow the instructions, I also had to simultaneously press a button on the front of the controller to "reset". Mine did reset, my problem was that I only showed two zones on the controller and I had three zones installed. This error occurred after the installer brought a new rain clik and receiver and installed those but did not check to be sure I still had three zones. I got them all back by doing a reset. Good luck. Debra