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Sprinkler & Irrigation Troubleshooting

Something not working right? Search your symptom below to find the likely cause, a few safe checks you can do yourself, and when it's time to call a pro. Written by the licensed irrigation techs at Aqua Premier — fixing systems across Northeast Florida since 2004.

22+ Years Local Licensed & Insured · Lic# BL-5805 All Brands Serviced

Sprinkler Head Problems

A sprinkler head is broken or shooting straight up

A cracked or sheared-off head usually geysers water or sprays straight up — one of the most common and easiest fixes.

Likely causes

  • Lawn-mower, vehicle or foot-traffic damage
  • Old, brittle plastic
  • Installed too high
  • Freeze damage

Try this first

  • Turn the zone off to stop water loss
  • Confirm the head body (not just the nozzle) is cracked
  • Note the brand & spray pattern for a correct match

Call a pro if: the riser snapped below grade or the fitting is cracked — we'll replace the head, match the pattern and re-check coverage.

A sprinkler head won't pop up

A head that stays low or barely rises is usually packed with grit, blocked by grass, or starved for pressure.

Likely causes

  • Dirt or sand inside the head
  • Grass grown over the head
  • Damaged riser or worn body
  • Low water pressure on the zone

Try this first

  • Trim grass back from around the head
  • Run the zone and watch if it tries to rise
  • Check whether nearby heads pop up normally

Call a pro if: the head still won't rise after clearing it — the body or riser likely needs replacing, or the zone has a pressure problem.

A head stays up and won't retract

When a head won't drop back down after the zone shuts off, debris or a worn retract spring is the usual culprit.

Likely causes

  • Debris packed in the seal
  • Worn retract spring
  • Damaged sprinkler body
  • Dirt mounded around the head

Try this first

  • Clear soil/mulch from around the head
  • Gently rinse around the stem

Call a pro if: cleaning doesn't fix it — the spring/body is worn and the head should be replaced.

Sprinklers are spraying the driveway or sidewalk

Watering pavement wastes money and usually means a head was bumped out of alignment or has the wrong nozzle.

Likely causes

  • Head knocked out of adjustment
  • Wrong nozzle for the area
  • Poor placement/spacing

Try this first

  • Most spray heads adjust by twisting the nozzle/collar to set the arc
  • Check the radius screw on the nozzle

Call a pro if: adjusting doesn't fix the overspray — the head may need a different nozzle or to be relocated.

A head sprays weakly, unevenly, or not at all

If one head is weak while the zone is otherwise fine, it's almost always a clog in the nozzle or filter screen.

Likely causes

  • Sand, dirt or debris in the nozzle
  • Clogged filter screen
  • Hard-water mineral buildup
  • Worn nozzle

Try this first

  • Unscrew the nozzle and rinse it and the filter
  • Flush the head with the zone running briefly

Call a pro if: several heads are weak — that points to pressure or a leak, not just a clog.

Rotor heads spray but don't rotate

Rotors (the heads that sweep back and forth) need adequate pressure and a working internal drive to turn.

Likely causes

  • Low water pressure
  • Debris jamming the rotor
  • Worn internal gear drive
  • Clogged filter screen

Try this first

  • Clear debris from the top of the head
  • Check whether all rotors on the zone are slow (pressure) or just one (the head)

Call a pro if: a single rotor is dead — the drive is worn and the head should be replaced; if all are slow, we'll diagnose the pressure source.

Zone Problems

One zone won't turn on (the others work)

When a single zone is dead but the rest run, the problem is almost always electrical or in that zone's valve.

Likely causes

  • Failed solenoid on the valve
  • Cut or corroded wire
  • Controller output/programming issue
  • Valve stuck closed

Try this first

  • Make sure the controller has power
  • Run the zone manually from the timer
  • Confirm the other zones still work
  • Check the main water supply is on

Call a pro if: the controller looks fine but the zone stays dead — it's likely the solenoid, wiring or valve, which needs voltage testing. See sprinkler & valve repair →

A zone won't shut off / keeps running

A zone still running after the controller stops means a valve is stuck open — and it can flood a yard fast.

Likely causes

  • Debris in the valve diaphragm
  • Stuck or failed valve
  • Bad solenoid
  • Worn diaphragm

Try this first

  • Shut off the irrigation water supply (main or pump) to stop the flooding
  • Note which zone/valve is stuck

Call a pro if: shutting the controller off doesn't stop it — the valve needs to be cleaned, rebuilt or replaced.

One zone has low pressure / weak spray

If just one zone is weak while others are strong, suspect a leak or a valve problem on that zone.

Likely causes

  • Underground leak or broken pipe on the zone
  • Partially failed valve
  • Too many heads on the zone
  • Multiple clogged nozzles

Try this first

  • Walk the zone for wet spots or bubbling while it runs
  • Clean a couple of nozzles to rule out clogs

Call a pro if: you find a wet area or the whole zone is weak — there's likely a buried leak to locate and repair.

Two or more zones run at the same time

Zones aren't meant to overlap — when they do, it's a valve, wiring, or programming issue.

Likely causes

  • A valve stuck open while the next runs
  • Wiring / common-wire fault
  • Overlapping start times in the program
  • Controller malfunction

Try this first

  • Check the controller for more than one start time per program
  • Note whether the same two zones always pair up

Call a pro if: the schedule is correct but zones still overlap — valves and wiring need testing.

Controller & Timer Problems

The controller screen is blank or has no power

No display almost always means the controller isn't getting power.

Likely causes

  • Tripped GFCI or dead outlet
  • Failed transformer/plug pack
  • Blown fuse
  • Failed controller
  • Power surge / lightning

Try this first

  • Reset the GFCI on the outlet (and breaker)
  • Confirm the outlet has power with another device

Call a pro if: power is good but the screen stays blank — the transformer or controller needs replacing. Consider a smart Wi-Fi upgrade →

Sprinklers run too often / every day

Over-watering is nearly always a programming issue — and an easy money-saver to fix.

Likely causes

  • Extra start times entered by mistake
  • Wrong watering days
  • Seasonal-adjust set too high
  • Smart schedule needs tuning

Try this first

  • Look for more than one start time per program — a common cause of "double" watering
  • Set the correct days for your county restrictions

Call a pro if: you'd rather we dial in an efficient seasonal schedule — it's part of every Premier+ tune-up.

Sprinklers come on at random times

Unexpected start times usually trace back to the controller's program, not a ghost in the system.

Likely causes

  • Several start times / overlapping programs
  • Incorrect or reset clock (AM/PM)
  • Smart-schedule settings
  • Power surge scrambled the program

Try this first

  • Check the time/date and AM-PM are correct
  • Review every program (A/B/C) for stray start times

Call a pro if: the program looks right but it still starts on its own — the controller may be failing.

My smart controller won't connect to Wi-Fi

B-hyve, Rachio and Hydrawise controllers need a 2.4 GHz network and a solid signal where the controller is mounted (often a garage wall).

Likely causes

  • Trying to join a 5 GHz network
  • Weak Wi-Fi signal at the controller
  • Wrong password
  • Router/app needs a reset

Try this first

  • Connect to the 2.4 GHz band specifically
  • Reset the controller and re-add it in the app
  • Try a Wi-Fi extender near the garage

Call a pro if: you want it installed and set up right the first time. See smart controller installation →

Valve & Solenoid Problems

The valve box is full of water

A little rainwater in a valve box is normal; a box that stays full or refills after pumping means a leak.

Likely causes

  • Leaking valve or fitting
  • Cracked manifold
  • Mainline leak feeding the box
  • Poor drainage around the box

Try this first

  • Bail/pump the box out and watch if it refills with the system off

Call a pro if: it refills on its own — a valve, fitting or manifold is leaking and should be repaired before it worsens.

A valve won't open/close (bad solenoid)

The solenoid is the small cylinder with two wires on top of the valve; it's what the controller energizes to open the valve.

Likely causes

  • Failed solenoid coil
  • Cut or corroded wire splice
  • Controller voltage problem
  • Lightning/surge damage

Try this first

  • Look for buzzing or no response when the zone is called
  • Check wire connections in the box for corrosion

Call a pro if: the solenoid is suspect — we test voltage, replace the solenoid, and waterproof the splices so it doesn't recur.

Water Pressure Problems

The whole system has low pressure

Weak spray across every zone points to the water supply, not individual heads.

Likely causes

  • Main or backflow valve only partly open
  • Clogged backflow/filter
  • Failing pump (on well/pump systems)
  • Mainline leak

Try this first

  • Check that both backflow valves are fully open
  • On city water, see if indoor pressure is also low

Call a pro if: the valves are open and pressure is still low — we'll trace it to the supply, backflow, pump or a leak.

Sprinklers are misting instead of spraying

A fine fog that drifts on the breeze is the classic sign of too much pressure for the heads.

Likely causes

  • Water pressure too high for the nozzles
  • Heads without pressure regulation
  • Wrong/worn nozzles

Try this first

  • Note if it's every zone (system pressure) or one type of head

Call a pro if: you want it fixed for good — pressure-regulating heads or nozzles stop the misting, improve coverage and cut water waste.

Leaks & Pipe Problems

There's a wet or soggy spot in the yard

A spot that stays wet — especially after the system runs — usually means a leak underneath it.

Likely causes

  • Broken pipe or fitting
  • Leaking head or riser
  • Mainline leak (wet even when off)
  • Or a drainage issue, not a leak

Try this first

  • Run each zone and watch which one worsens the wet spot
  • Note if it's wet even when the system is off (suggests mainline)

Call a pro if: there's a buried leak — we locate the exact spot and repair the pipe with minimal digging.

Water bubbles up from the ground when it runs

Water surfacing from the lawn (not a head) means a cracked pipe or fitting below.

Likely causes

  • Broken PVC pipe or fitting
  • Cracked riser
  • Mainline leak

Try this first

  • Shut the zone off to limit erosion/water loss
  • Mark the spot so it's easy to find again

Call a pro if: it's underground — locating and repairing buried lines is a quick job for us and prevents a bigger washout.

My water bill suddenly jumped

An unexplained spike very often traces back to the irrigation system running or leaking when you don't notice.

Likely causes

  • Hidden underground leak
  • Valve stuck partly open
  • Broken pipe
  • Controller watering too often

Try this first

  • Check the controller schedule for extra start times
  • Walk the yard for wet areas after a cycle

Call a pro if: you can't find an obvious cause — a leak test will pinpoint where the water is going.

Pump & Well Problems

The irrigation pump won't turn on

On well/pump systems, the pump must start for any zone to get water.

Likely causes

  • Tripped breaker
  • Bad pump-start relay
  • Pressure-switch problem
  • Failed motor or capacitor

Try this first

  • Check the breaker for the pump
  • Listen for a click/hum when a zone is called

Call a pro if: the breaker's on but the pump's silent — relays, switches and motors need testing. See pump & well service →

The pump runs but no water comes out

A motor that runs without delivering water has usually lost its prime.

Likely causes

  • Air leak on the suction side
  • Bad check valve / foot valve
  • Clogged intake or low water source
  • Worn impeller

Try this first

  • Re-prime the pump per its instructions
  • Look/listen for air being drawn on the suction line

Call a pro if: it won't hold prime — there's a suction leak or check-valve issue to repair. See pump & well service →

The pump keeps losing prime

If you have to re-prime every time, air is getting into the suction side between cycles.

Likely causes

  • Air leak in the suction line
  • Failed check/foot valve
  • Cracked fitting
  • Worn pump seal

Try this first

  • Inspect visible suction fittings for drips or hissing

Call a pro if: the leak is hidden — we pressure-check the suction side, replace the check valve and reseal as needed.

Rain Sensor Problems

Sprinklers run while it's raining

Florida requires a working rain shut-off device — if yours waters in the rain, the sensor isn't doing its job.

Likely causes

  • Failed or aged rain sensor
  • Sensor bypassed at the controller
  • Sensor wire disconnected
  • No sensor installed

Try this first

  • Check the controller's sensor switch isn't set to "bypass"
  • Press the sensor's test plunger (if accessible) to confirm it stops the zones

Call a pro if: the sensor's bad or missing — we replace it, or upgrade you to a smart controller that skips watering on local weather.

Sprinklers won't run after it rains

After rain it's normal for a sensor to pause watering until it dries — but if it stays off for days, the sensor may be stuck.

Likely causes

  • Rain sensor stuck wet / slow to dry
  • Failed sensor
  • Low wireless-sensor battery
  • Controller sensor setting

Try this first

  • Check the sensor isn't holding moisture
  • Replace a wireless sensor's battery

Call a pro if: it won't reset — the sensor or its wiring needs service.

Lawn & Watering Questions

Brown/dry spots even though the sprinklers run

Dry patches usually mean uneven coverage, not too little total water — water is landing everywhere except that spot.

Likely causes

  • Clogged or misaligned heads
  • Low pressure on the zone
  • Poor head spacing / coverage gaps
  • Wrong run time

Try this first

  • Run the zone and watch if water actually reaches the brown area
  • Clean/realign nearby heads

Call a pro if: coverage gaps remain — a tune-up adjusts heads, nozzles and spacing so the whole lawn gets even water. See sprinkler tune-up →

How long & how often should I run my sprinklers in Florida?

A good NE-Florida starting point: water early morning, about 2 days a week, aiming for roughly ½–¾ inch of water per session.

Rough run times

  • Spray zones: ~15–20 min
  • Rotor zones: ~30–45 min
  • Sandy soil: split into shorter cycles so water soaks in instead of running off

Keep in mind

  • Always follow your county's current watering-day restrictions
  • Cut back in the rainy season; a smart controller does this automatically

Want it dialed in? We set an efficient seasonal schedule on every visit. See Premier+ plans →

Drainage & Standing Water

My yard is too wet / has standing water after watering

If the lawn stays soggy after a normal cycle, it's either over-watering, a leak, or a true drainage problem.

Likely causes

  • Schedule waters too long/often
  • A leak or stuck valve adding water
  • Low spot or poor grading that traps water
  • Compacted or clay-heavy soil

Try this first

  • Trim back run times and see if it improves
  • Confirm no zone is leaking or stuck on

Call a pro if: water still pools — you may need drainage. We install French drains, catch basins and downspout drainage. See drainage solutions →

Still stuck? We'll diagnose it for you.

Tell us what your system is doing and a local Aqua Premier technician will track down the cause and fix it right — serving Jacksonville, Ponte Vedra, Nocatee, St. Augustine & all of St. Johns & Duval Counties.

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