I have a Rainbird ESP-4 controller. Zone 1 will not shut off and runs continually even when zone 2, 3 or 4 are on. It does shut off when power to controller is disconnected which tells me solenoid / valve is good. Controller is 2 yrs old and obviously bad, is it possible to repair or more cost effective to replace? Would you suggest replacing with same mfg & model?
