Bypassing a 3-Wire Kwik-Click Rain Sensor on Hardie Controller

If your Kwik-Click rain sensor (three blue wires) prevents manual watering intermittently and you can't locate the common wire splice, you can bypass it at the sensor itself.

Sensor Wiring Logic

The three blue wires connect internally to red, black, and blue leads. Only red and black interrupt the common circuit. The third wire is typically a ground or unused.

Bypass Method

1. Locate the sensor's junction point (often a splice box near the sensor).
2. Identify the red and black wires from the sensor cable.
3. Connect them together with a waterproof connector.
4. If you can't distinguish them, connect all three blue wires together — it simply closes the common circuit and won't cause harm.

Alternative: Controller Bypass Switch

Some Hardie controllers have a slide switch inside the cabinet (upper right) labeled "Rain Sensor Bypass" — slide to OFF.

After Bypass

System will ignore rain sensor. Remember to re-enable or replace sensor for water conservation compliance.