Toro ECx Loses Programs A & B—Only Program C Shows

Toro ECx 6-zone suddenly only shows Program C. Programs A & B disappeared. Reprogrammed A onto C but need second program.

Reset Procedure

1. Remove 9V backup battery
2. Power off controller 1 minute
3. Power on WITHOUT battery
4. Check if programs restored
5. If yes: reinstall battery, reprogram
6. If no: controller circuit board failed → replace

Cause

Memory corruption from power surge or age. Battery backup should prevent this—if battery was dead during outage, memory lost.