Rain Bird Sprinkler Timer Isa 304 Manual Jun 2026

: Choose a pre-set (1–5) or "Custom" (C) schedule.

While the Rain Bird ISA 304 is incredibly durable, mechanical components and older LCDs degrade over time. If your buttons become unresponsive or the internal relays fail, it may be time to upgrade. Modern replacements—such as the or SST Series —offer modern features like Wi-Fi compatibility, automatic weather adjustments, and simpler digital interfaces while using the exact same wiring framework. Upgrading takes less than 20 minutes, as you simply transfer the existing zone wires over to the new terminal block.

If your controller is not working correctly, consult these common troubleshooting steps: Possible Cause No power, faulty wiring, or rain sensor active. rain bird sprinkler timer isa 304 manual

Inspect the dial for dirt or debris blocking the pin release. Defective sprinkler valve

is strictly an . It must be installed in a garage, shed, or covered utility room to protect its electronic components from moisture. Mounting the Controller : Choose a pre-set (1–5) or "Custom" (C) schedule

Remove the lower access cover and drive a third screw through the lower middle mounting hole for maximum stability. Wiring the Terminal Strips

: Turn the dial to Custom Schedule – Duration . Select a station using the arrow keys, then press Advance to make the duration flash. Set the time (1 minute to 2 hours) and repeat for each station. Modern replacements—such as the or SST Series —offer

Rain Bird ISA-304 is a 4-station indoor sprinkler timer designed for residential use. It features six pre-set watering schedules and the ability to customize programs to fit specific landscape needs. To program the Go to product viewer dialog for this item.