Controller Programming Lost or Reset
If your controller lost its schedule, it's usually from a power outage combined with a dead backup battery. Reprogram the schedule and replace the battery.
Symptoms
- Controller shows default/blank programming
- Zones don't run on schedule but work when manually activated
- Clock shows the wrong time
Diagnosis
A power outage drained the backup battery, causing the schedule to revert to factory defaults.
Step-by-Step Repair
- 1
Replace the 9V backup battery (or CR2032 lithium battery, depending on the controller model).
- 2
Set the current date and time.
- 3
Reprogram your watering schedule: set start times, zone run times, and watering days.
- 4
Run each zone manually for 1-2 minutes to verify all zones are still connected and working.
- 5
If the controller keeps losing programming even with a fresh battery, the internal clock circuit may be failing. Consider replacing the controller.
Parts Needed
- •Controller (4-Zone) × 1 — Only if internal clock circuit has failed
Pro Tips
- Write your watering schedule on a label and stick it inside the controller door — makes reprogramming easy.
- WiFi-enabled controllers store schedules in the cloud, so power loss doesn't erase them.
Prevention Tips
- Replace the backup battery annually each spring when you start up the system.
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