Troubleshooting a Single Zone Failure After Sprinkler Head Replacement

After replacing a broken sprinkler head, one zone on a Toro Vision 1 controller refuses to activate automatically, though manual valve operation works fine. The other three zones function normally, and the controller has been power-cycled without success. The broken head sprayed water unrestricted for up to a week during scheduled cycles.

Diagnosing the Issue

The broken head itself wouldn't cause controller malfunction, but the repair process might have damaged wiring. Inspect all wire connections at the valve and controller for soundness. Verify the valve's flow control is set to roughly halfway open. For detailed guidance on valve wiring and repair, consult this irrigation tutorial:

Irrigation Installation Tutorial

Check for nicked wires, loose connections, or solenoid issues. If wiring checks out, the valve diaphragm or solenoid may need replacement.