I have a Rainbird timer model ESP-TM. It has worked correctly in the past, however lately it keeps repeating the complete cycle. It will cut the valves on three zones for 50-48-26 minutes. When zone three finishes, it starts the entire cycle again. I use "A" schedule only. The "B" schedule is programmed "off".
I troubleshot it by selecting the "3" day cycle instead of "custom. Same result.
Any suggestions?

Is your low battery light on sometimes they malfunction when low on power if not I believe if you cut the power for 90 or 120 sec it should re set the clock then you can program it to the settings you want