Lawn Genie LD-4 Controller Unresponsive After Power Outage

Resetting a Frozen Lawn Genie LD-4 Controller

Following a power outage, a Lawn Genie LD-4 controller displays "OFF" and ignores all dial and button inputs. The user confirmed 24 VAC at the terminals, a good fuse, and a fresh 9 V backup battery.

Perform a Full Controller Reset

1. Unplug the controller from the wall outlet.
2. Remove the backup battery.
3. Wait at least 5 minutes.
4. Plug the controller back in.
5. Press and hold the reset button (location varies by model) for several seconds.
6. The controller will enter default mode—reprogram date, time, watering days, and run times.
7. Reinstall the backup battery once programming is complete.

This reset clears any corrupted memory caused by the power interruption and restores normal operation.