Sprinkler system troubleshooting: common problems and fixes
Most sprinkler problems come down to a handful of causes. Check these first — and if it's underground or electrical, book a diagnosis so you're not digging blind.
A zone won't turn on
Usually a failed solenoid, a cut or corroded field wire, or a controller station fault. Try running the zone manually at the controller, then at the valve (most have a manual bleed).
Heads won't pop up or spray weakly
Check for a partially closed supply valve, a clogged nozzle or filter, or a broken line elsewhere on the zone bleeding off pressure. Too many heads on one zone also causes weak coverage.
A zone won't shut off
Debris in the valve diaphragm or a failed solenoid can hold a valve open. Shut the irrigation supply and book a repair.
Soggy spot or water bubbling up
A broken lateral, cracked fitting or a head broken at the riser — common after winter or mowing damage.
Controller shows a fault
Often a short in a valve wire. Replacing the controller won't fix a field-wire fault; it needs tracing.
Common questions
- How much is a sprinkler repair visit?
- A service call with full system diagnosis starts at the minimum charge shown on our repairs page and is applied to the approved repair.
- Do you repair all brands?
- Yes — Orbit, Rain Bird, Hunter, Toro and others.
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- Sprinkler zone won't turn off: causes and fixes
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- Valve box full of water: what it means
- Lawn sprinkler systems: a homeowner's guide
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- Rain Bird sprinkler system repair
- Hunter sprinkler system repair
- Orbit sprinkler system repair
- Toro sprinkler system repair
- Weathermatic sprinkler system repair
- K-Rain sprinkler system repair
- When to winterize your sprinkler system in the GTA
- When to turn your sprinklers on in spring in Ontario
- Sprinkler system cost in Toronto and the GTA
- What sprinkler winterization costs in the GTA