The most common sprinkler repairs (and what usually causes them)
1) Broken or tilted sprinkler heads
Mowers, foot traffic, and soil settling can tilt heads so they spray sidewalks or blast one direction. Cracked bodies or worn seals can also cause “mini geysers.” A proper fix isn’t just swapping the head—alignment, height, nozzle selection, and arc adjustment matter for even coverage.
2) Low pressure or weak zones
Low pressure can come from a hidden leak, a partially closed valve, clogged filter/nozzle, a failing valve diaphragm, or too many heads on one zone. The key is diagnosis: a repair that ignores the root cause often leads to repeated brown spots and constant “tinkering.”
Quick homeowner check: If only one head is weak, it’s often a clogged nozzle or damaged head. If the whole zone is weak, suspect a valve issue or a line leak.
3) Leaking valves, valve box flooding, or zones that won’t shut off
If a zone runs on its own or won’t fully shut off, the issue may be debris in the valve, a torn diaphragm, a stuck solenoid, or wiring/controller problems. A flooded valve box can also reduce performance and create soft spots in the yard.
4) Underground line breaks (the “mystery wet spot”)
Line breaks can show up as a persistent soggy area, sinking soil, or sudden pressure loss in a zone. Repairs should include proper fittings, clean cuts, and compaction so you don’t get a recurring depression in the lawn later.
5) Controller, wiring, and rain/freeze sensor issues
If zones don’t start, start intermittently, or run at weird times, it may be a timer programming issue, a bad common wire connection, corrosion, or a failed solenoid. Electrical diagnosis is where a lot of DIY repairs stall—especially with intermittent faults.