A sprinkler system is one of those things you do not think about until something goes wrong. By the time you notice a problem, your lawn may already be suffering and your water bill climbing.
Catching issues early saves money, water, and turf. Here are seven signs that your irrigation system needs professional attention.
1. Dry Spots or Brown Patches
This is usually the first thing homeowners notice. If one section of your lawn is green and healthy while another area is browning out, there is likely a coverage gap.
Common causes include:
- A head that has shifted direction from mowing or foot traffic
- A clogged nozzle reducing spray distance
- A broken head that is not popping up at all
- Spacing issues from the original installation
Do not just increase run times to compensate. That overwater the rest of the lawn while the dry area barely improves. The real fix is adjusting or replacing the affected heads.
2. Unusually High Water Bills
If your water bill spikes during irrigation season without an obvious explanation, your system is likely wasting water somewhere. A single stuck valve running continuously can add hundreds of dollars to a monthly bill.
Underground leaks are the sneakiest culprit. Water may be pooling below the surface where you cannot see it, slowly eroding soil and saturating areas near foundations, sidewalks, or driveways.
If your bill is noticeably higher than the same month last year with similar usage, have your system inspected.
3. Low Water Pressure on One or More Zones
When heads barely trickle instead of spraying their full pattern, the zone is not getting enough pressure. This can be caused by:
- A partially closed valve (sometimes bumped during landscaping)
- A cracked pipe leaking water underground before it reaches the heads
- Too many heads on a single zone (common in older systems that have been expanded)
- Municipal water pressure changes
Low pressure means uneven coverage, which leads directly to those brown patches mentioned above.
4. Heads That Will Not Pop Up or Retract
Sprinkler heads are mechanical devices that take a beating. They get run over by mowers, buried by mulch, clogged with dirt, and cracked by freeze-thaw cycles. In southern Minnesota, we replace more heads due to winter damage than any other cause.
A head stuck in the down position does nothing. A head stuck in the up position becomes a trip hazard and a target for your mower blade. Both need replacement.
5. Leaking or Seeping Around Heads and Valves
Puddles forming around sprinkler heads when the system is running — or worse, when it is off — indicate a seal failure or cracked fitting. Low-head drainage (water draining from the lowest heads after a zone shuts off) is normal to a degree, but persistent pooling is not.
Valve box areas that stay wet or muddy usually mean a valve diaphragm has failed. These are inexpensive parts but require proper diagnosis and repair to fix correctly.
6. Uneven or Misdirected Spray Patterns
Heads should spray in a consistent, even arc that overlaps slightly with adjacent heads. When spray patterns become erratic, lopsided, or mist-like, it is usually a worn nozzle, incorrect pressure, or internal damage.
Misting is particularly wasteful. Fine mist evaporates before it reaches the ground, especially during warm Minnesota afternoons. You are paying for water that never makes it to your lawn.
Heads spraying onto sidewalks, driveways, or your neighbor's property also waste water and can create ice hazards in shoulder seasons.
7. Controller or Programming Issues
If your system runs at odd hours, skips zones, or will not respond to schedule changes, the controller may be failing. Common controller problems include:
- Backup battery failure causing lost programming after power outages
- Corroded terminal connections
- Damaged wiring between the controller and valves
- Outdated controllers that lack rain sensor or smart scheduling features
Modern smart controllers can reduce water usage by 20 to 30 percent compared to basic timers by adjusting run times based on weather data. If your controller is more than 10 years old, upgrading often pays for itself within two seasons through water savings alone.
Why Early Repair Matters
Small irrigation problems become expensive ones when ignored. A $30 head replacement becomes a $300 lawn repair if the dry spot kills the turf. A slow underground leak can undermine walkways and foundations over time.
Homeowners across Owatonna, Faribault, and Mankato trust our licensed irrigation technicians to diagnose and fix problems efficiently. We carry parts for all major brands on our trucks, so most repairs are completed in a single visit.
What a Repair Looks Like in Practice
See how we diagnosed and fixed a multi-zone pressure issue on a property in Faribault — one visit, same-day resolution.
View Our Irrigation Projects →
Don’t Let a Small Problem Become a Big One
If you have noticed any of these signs, do not wait for it to get worse. We offer fast-response irrigation repair throughout the growing season, and our lawn care team can address any turf damage at the same time.
Prefer to talk it through? Reach us at (507) 455-0081.