Troubleshooting Components Brands Tools Maintenance
Homeowner irrigation guides

Fix the sprinkler problem, not the wrong part.

Clear troubleshooting for residential sprinkler and irrigation systems. Start with the symptom, narrow the cause, then decide what to check, repair, or replace.

Popular: Low pressure Zone won't run Valve leaks Controller issues
Quick diagnostic

What is your system doing?

Pick the symptom that is closest to what you see. The production tool can branch into deeper checks.

Evidence-ledManufacturer and authoritative sources where technical claims matter.
Built for homeownersDiagnosis first, unnecessary replacement second.
Editorially structuredQuick answer, causes, checks, repair options, and next steps.
Start with the symptom

You do not need to know the part name yet.

Choose what the system is doing. Each hub narrows the likely causes before sending you into model-specific or component-specific guides.

Low pressure

Weak spray, heads not fully rising, or one zone performing worse than the rest.

Zone won't turn on

Controller says the zone is running, but the sprinklers stay dry or silent.

Zone won't turn off

One zone keeps watering after the controller cycle ends or after power is removed.

Leaks or pooling water

Wet valve boxes, soggy spots, leaking heads, or water appearing while the system is off.

Controller problems

Error messages, missed schedules, offline smart controllers, or zones that run unexpectedly.

Uneven watering

Dry patches, overspray, runoff, mixed head performance, or inconsistent coverage.
Useful before replacing parts

Turn symptoms into a smaller list of likely causes.

Interactive tools should do something a generic article cannot: calculate, narrow, compare, or guide the next check.

Sprinkler Diagnostic ToolAnswer a short sequence of questions to narrow the likely problem. Sprinkler Runtime CalculatorEstimate runtime from precipitation rate, watering target, and cycle strategy. Water Use EstimatorEstimate irrigation gallons and compare scheduling scenarios.
Browse by component

Go deeper once you know where to look.

01 Valves & solenoidsStuck zones, leaking valves, diaphragms, manifolds, and solenoid checks. 02 Sprinkler heads & nozzlesHeads that will not pop up, poor rotation, overspray, clogging, and replacement. 03 Controllers & wiringSchedules, zone output, common wires, sensors, and smart-controller issues. 04 Drip irrigationClogged emitters, low flow, pressure regulation, filters, tubing, and leaks. 05 Pressure & flowPSI, GPM, zone sizing, flow restrictions, and pressure-related diagnosis.
Popular troubleshooting

Guides built around real failure symptoms.

Valves

Sprinkler Zone Won't Turn Off: Causes and Diagnostic Order

Start with the valve, then separate a mechanical problem from controller or wiring issues.

Troubleshooting guide
Pressure & flow

Why One Sprinkler Zone Has Low Pressure

Compare zone-specific restrictions, leaks, valve opening, flow demand, and supply issues.

Diagnostic guide
Controllers

Controller Says a Zone Is Running but No Water Comes Out

Follow the control path from timer output to wiring, solenoid, valve, and water supply.

Electrical + valve diagnosis
Brand-specific help

When the model matters.

Brand pages should exist only where controller behavior, parts, error states, or documentation genuinely differ.

Rain Bird Hunter Orbit Rachio Toro
Latest guides

Recently reviewed and published.

Valves Sprinkler Valve Box Full of Water: Leak or Normal Drainage? Reviewed Sep 2026 Sprinkler heads Sprinkler Head Won't Pop Up: What to Check Before Replacing It Reviewed Sep 2026 Drip irrigation Drip Irrigation Low Pressure: Filter, Regulator, Flow, or Supply? Reviewed Sep 2026 Maintenance Spring Sprinkler Startup Checklist for Homeowners Reviewed Sep 2026
Latest published guides

Recently published troubleshooting

Hunter PGP Ultra Sprays but Won't Rotate: Filter, Arc, or Replace?Hunter PGP Ultra sprays but won't rotate: manufacturer-based troubleshooting arc from arc reset to filter cleaning to rotor replacement, with a conditional zone pressure check.Hunter ICV Valve Won't Open or Opens Partially: Troubleshooting GuideConcise SEO-first content brief for troubleshooting a Hunter ICV valve that won't open or opens partially.Hunter Hydrawise "High Solenoid Current" Alert: What It Means and How to Troubleshoot ItExplains the Hunter Hydrawise High Solenoid Current alert as an electrical zone-circuit fault and walks Hunter's published isolation sequence, including the shared suspects when the alert appears on every zone.Hunter Pro-C SP ERR: What It Means and How to Fix ItA focused troubleshooting article explaining that Hunter Pro-C SP ERR is an electrical-noise fault entering through the SmartPort/remote connection, with the documented inspection and shielded-cable fix path.Rain Bird 1804 Sprinkler Head Won't Pop Up Fully: Diagnosis and FixRain Bird 1804 sprinkler head won't pop up fully: identify the exact 1804 variant, split zone-wide pressure from single-head obstruction, and decide between cleaning and replacing the internal assembly.Rain Bird 1800 SAM Sprinkler Head Drains After Watering: Normal or Not?A Rain Bird 1800 SAM head may keep draining after the zone shuts off because the Seal-A-Matic check valve is rated only up to 14 feet of elevation head, because the head was installed outside spec (bottom-inlet only), or because the zone valve itself is passing water — not necessarily because the head is broken.