Common sprinkler problems (and what they’re telling you)
A sprinkler system is a set of simple parts that can fail in a few predictable ways. The key is recognizing the “symptoms” early—before runoff, trenching, or a surprise water bill shows up.
1) Dry patches in the same spots (even with longer run times)
This is often coverage, not fertilizer. Look for clogged nozzles, heads that don’t fully pop up, heads spraying into sidewalks, or poor “head-to-head” coverage where one sprinkler isn’t reaching the next. Extending run time can mask the problem, but it usually increases waste and can create soggy zones elsewhere.
2) A zone that won’t turn on (or only trickles)
Common causes include a failed solenoid, debris in the valve, a controller wiring issue, or a partially closed manual valve. If one zone is weak while others are fine, it’s usually a zone-specific valve or line issue rather than a whole-system water supply issue.
3) A zone that won’t shut off
This can indicate a valve stuck open, a damaged diaphragm, or debris lodged inside the valve. If water keeps running, shut off the irrigation supply to prevent flooding and landscape damage, then schedule service. This is one of those problems that can turn expensive fast if ignored.
4) “Geysers,” bubbling, or a suddenly soggy strip of turf
Those are classic signs of a broken head, cracked riser, or a split line. The faster you address it, the less likely you’ll deal with soil washout, settling, or larger excavations.
5) Spray drift, misting, or fog-like sprinkler output
Misting is often a pressure issue or a nozzle mismatch. Wind turns mist into wasted water. Correcting nozzles, pressure regulation, and head type selection can tighten coverage and reduce runoff.