A smart irrigation controller needs a verified zone map and a working irrigation system before its weather features can be useful. Start by identifying the existing controller, valve wiring and water supply. After installation, confirm that each named zone actually waters the intended area and stops correctly. The app’s schedule is not proof that the valves and sprinklers work.
Research-based owner checklist, checked September 28, 2026. We have not installed the controllers discussed here. This is a planning and verification guide, not a substitute for the model’s wiring instructions or professional electrical, pump or backflow work.
Before replacing a working controller
- Photograph and label the existing terminals. Record zone labels, common connections, sensors and any master-valve or pump-relay connection before anything is disconnected.
- Identify compatibility by model. Check supported valve type, zone count, sensors, installation location and network requirements.
- Record what already fails. A dry zone, stuck valve or leaking head is an existing system problem; changing controllers may leave it unchanged.
- Locate the ordinary stop control and irrigation shutoff. Know how to stop watering if a commissioning test behaves unexpectedly.
Rachio’s manuals and resources distinguish generations and products; select the matching document rather than a generic wiring picture. Pump relays, shared commons and multi-controller systems require particular care. Rachio publishes separate professional guidance for shared wiring; do not move those conductors by colour or improvise a direct pump connection.
Create a zone map that someone else can use
Use names such as “front sunny lawn” or “north drip bed” instead of only zone numbers. Keep physical observations separate from settings you still need to confirm.
| Zone / location | Equipment and site | Observed problem | Verified operation |
|---|---|---|---|
| 1 / ________ | Spray, rotor or drip; plants; shade; slope | Leak, dry area, runoff or none observed | Starts / stops / coverage checked |
| 2 / ________ | ________ | ________ | ________ |
| 3 / ________ | ________ | ________ | ________ |
Enter plant, soil, exposure and nozzle information from the actual zone rather than choosing defaults to finish onboarding quickly. If you do not know a field, identify it or ask the installer; a guessed soil or precipitation setting can produce an unsuitable schedule.
Commission one zone at a time
- Install using the exact model instructions. Isolate power as directed before wiring. Stop for unidentified wiring, damaged conductors or an installation requiring work outside your competence.
- Verify the intended local control. Learn how to start and stop an ordinary manual test without depending on a remote notification.
- Run each zone while watching its actual area. Match the terminal/zone name to the physical sprinklers or drip area. Use a supervised test appropriate to the system rather than a generic runtime.
- Stop the test and confirm water stops. An app reporting OFF while water continues needs investigation at the irrigation system.
- Record coverage and faults. Repair leaks, blocked or misdirected heads and other physical problems before using schedule changes to compensate.
Build a schedule from restrictions and the site
Start with local watering rules, then use the controller’s supported schedule type. Check permitted days, time windows, zone information, rain-sensor settings and any seasonal or weather adjustment. Avoid leaving an old fixed program active beside a new automatic routine unless the model explicitly calls for that arrangement.
The EPA WaterSense controller guidance distinguishes weather-based and soil-moisture-based products. Certification and estimated program-wide savings do not demonstrate savings at your property. Keep meter readings or irrigation records if you want to evaluate your own result.
Measurement plan: record water use over comparable periods before and after the controller change. Take a start and end meter reading for each period, note other household use, and compare weather and watering conditions. A lower bill after a rainy month is not enough to attribute the reduction to the controller.
Separate a network problem from a watering problem
| Observation | Check next |
|---|---|
| App says offline, but scheduled watering occurs | Check model-specific offline behaviour and network access; avoid clearing the working program as the first step. |
| Controller is online, but one zone stays dry | Record whether that zone was commanded, skipped or faulted; compare with its supervised manual test. |
| No zones water | Check the displayed status, enabled schedule, sensor/skip state and known supply conditions before assuming a controller defect. |
| Water continues after the controller is stopped | Use the known irrigation shutoff if safe and have the valve/system checked; repeated app changes may not stop a mechanical fault. |
For documented differences among platforms, see what still runs when a controller is offline. For selecting a replacement, use our controller comparison.
Winter shutdown is more than changing the app
Stopping the schedule does not remove water from pipes or backflow equipment. Hunter’s winterization instructions distinguish manual-drain, automatic-drain and compressed-air methods. The correct method depends on the installed system. A blowout is not a universal DIY step; compressed air can cause injury and equipment damage.
Have the system type and shutdown procedure established before freezing weather. Keep the controller powered or disconnected according to that model’s instructions, which can differ between brands. Use our winterization guide for the separate controller and plumbing decisions.
Update — September 28, 2026: Removed universal blowout and unsupported diagnostic instructions; added zone mapping and commissioning checks.