A practical homeowner checklist: how to troubleshoot before you schedule sprinkler repair
If you’re comfortable doing a quick walk-through, this step-by-step can help you pinpoint what’s wrong. Even if you plan to call a pro, having clear symptoms speeds up diagnosis and avoids “guesswork repairs.”
Step 1: Run each zone and watch like a technician
Turn on one zone at a time. Walk the full zone perimeter and look for: pooling water, heads that don’t pop up, spray blocked by grass, misting, or water shooting from the side of the head. Make note of the zone number and what you see.
Step 2: Check for coverage problems (not just “is it running?”)
A system can “run” and still underperform. If you see dry bands between heads, the issue is often alignment, the wrong nozzle, or a head that’s partially clogged. If water is hitting sidewalks and driveways more than turf, that’s wasted irrigation—and usually an easy adjustment.
Step 3: Look for valve symptoms (the ones that cost the most when ignored)
If a zone won’t shut off completely, it may be a valve diaphragm that isn’t sealing or debris preventing closure—meaning water can seep continuously. That “quiet” problem can keep soil saturated, weaken roots, and spike water use.
Step 4: Verify controller basics (schedule, start times, and seasonal adjustments)
Many watering problems are programming problems. Confirm the correct date/time, start times, run times, and that your schedule matches the season. EPA WaterSense guidance emphasizes using weather-based controllers or regularly adjusting clock timers for seasonal conditions rather than leaving one schedule all summer.
Step 5: Don’t ignore the backflow area
If you see water dripping or discharging near the backflow preventer during operation, stop and investigate. Backflow devices protect the potable water supply; persistent leaking can signal internal wear, debris, or pressure-related issues. This is typically a “repair sooner than later” item.