Let me start with something I hear all the time:
“Bob, some of my sprinkler heads just stopped working. The rest of the system runs—but these don’t do anything.”
And I’ll usually say:
👉 “That’s more common than you think—and it’s usually fixable.”
Because here’s the truth:
👉 When a sprinkler head isn’t working, it’s almost never random.
👉 There’s always a reason—and once you find it, the solution becomes clear.
So let’s walk through this the same way I would if we were standing in your yard together.
First—“Not Working” Can Mean Different Things
Before we even talk about causes, we need to define what you’re seeing.
Because homeowners say “not working” and it can mean a few different things:
- The head doesn’t pop up at all
- It pops up, but no water comes out
- It sprays weakly or unevenly
- It works sometimes, but not always
👉 Each of these points to a different issue—and a different cost to fix.
The 9 Most Common Reasons Sprinkler Heads Stop Working
Let’s go through what we actually see in the field.
1. Clogged Nozzle (Most Common)
Dirt, debris, or sand can clog the nozzle.
👉 Water can’t pass through properly
Result: – Weak spray – No spray at all
2. Broken or Damaged Head
Heads get hit all the time: – Lawn mowers
– Foot traffic
– Vehicles
👉 Internal components break
3. Head Stuck Below Ground
Sometimes heads don’t pop up fully.
Causes: – Dirt buildup – Compaction – Mechanical wear
👉 Water stays underground or sprays poorly
4. Low Pressure in the Zone
If pressure is too low:
👉 Heads can’t activate properly
5. Too Many Heads on One Zone
Overloaded zones reduce pressure.
👉 Some heads stop working completely
6. Valve Issues
Each zone is controlled by a valve.
If the valve isn’t working:
👉 The entire zone—or parts of it—fail
7. Broken Pipe or Leak
If water is leaking underground:
👉 Pressure drops before it reaches the head
8. Electrical or Wiring Problem
Controller signals control valves.
If wiring is off:
👉 Some zones won’t activate properly
9. System Imbalance Over Time
Repairs and changes add up.
👉 System gradually stops working as intended
A Real Story From the Field
A homeowner told me:
“Bob, three heads just stopped working out of nowhere.”
We checked it out and found:
- One clogged nozzle
- One misaligned head
- One pressure issue due to overload
Three different causes.
👉 One system problem.
We fixed everything in one visit.
Why This Problem Spreads (This Is Key)
Here’s what most homeowners don’t realize:
👉 One bad head affects the entire system.
When a head stops working:
- Water pressure shifts to other heads
- Some areas get too much water
- Others get even less
👉 It creates a chain reaction
That’s why ignoring one issue often turns into multiple problems.
What It Costs to Fix Non-Working Heads
Let’s talk real numbers.
Minor Fixes
- Cleaning nozzle
- Adjusting head
👉 $75 – $200
Head Replacement
- New sprinkler head installed
👉 $100 – $300 per head
Pressure or Zone Fixes
- Rebalancing system
👉 $300 – $1,500+
Valve or Electrical Repair
👉 $200 – $800+
Real Cost Scenarios (What This Actually Looks Like)
Scenario 1: One Head Not Working
👉 $100 – $250
Quick fix. Usually simple.
Scenario 2: Several Heads in One Zone
👉 $250 – $800
Now we’re looking at pressure or coverage issues.
Scenario 3: Multiple Zones Affected
👉 $800 – $2,500+
System imbalance likely.
Scenario 4: Ongoing Issues Every Season
👉 $2,500 – $6,000+
At this point, it’s not just repair—it’s correction.
What Happens If You Ignore It
This is where it gets expensive.
If you leave it alone:
- Dry spots spread
- Lawn weakens
- System runs longer to compensate
- Water bills increase
- More parts fail
👉 Small issue becomes ongoing cost
A Real Cost Over Time Example
Let’s say you ignore a small issue.
Year 1: 👉 $150 problem
Year 2: 👉 $400 in fixes
Year 3: 👉 $1,200 in repairs
👉 Total: $1,750+
When fixing it early? 👉 Might have been $200
The Biggest Mistakes Homeowners Make
Mistake #1: Ignoring It
👉 Small problem becomes big
Mistake #2: Replacing Without Diagnosing
👉 You fix the symptom—not the cause
Mistake #3: Waiting for More Heads to Fail
👉 System imbalance grows
Mistake #4: Adjusting Instead of Fixing
👉 Doesn’t solve root problem
How We Fix This the Right Way
Here’s how we approach it.
Step 1: Run Every Zone
We don’t guess—we observe.
Step 2: Identify Root Cause
Pressure? Head? Valve? Layout?
Step 3: Fix the Problem
Not just patch—correct.
Step 4: Check the Entire System
Prevent future issues.
Simple Checks You Can Do Today
- Turn on each zone individually
- Watch for heads not popping up
- Look for weak spray
👉 These clues tell you what’s wrong
FAQ (What Homeowners Always Ask Me)
“Do I need a whole new system?”
👉 Usually no.
Most systems can be corrected.
“Why did this suddenly happen?”
👉 It didn’t.
It built up over time.
“Can I fix this myself?”
Some minor issues—yes.
But system problems? 👉 Usually not.
What a Properly Working System Feels Like
When everything is right:
- All heads pop up evenly
- Coverage is consistent
- No dry spots
👉 It just works
Final Thoughts from Bob Carr
If some of your sprinkler heads aren’t working, it’s not random.
👉 It’s your system telling you something needs attention.
The good news?
👉 Most of the time, it’s fixable.
And the sooner you deal with it:
👉 The easier—and cheaper—it is.
Because in irrigation systems:
👉 Small problems never stay small.
Ready to Get Your System Back on Track?
If your sprinkler heads aren’t working the way they should, let’s take a look.
👉 Call TLC Incorporated today
👉 Or schedule your irrigation inspection
We’ll show you exactly what’s going on…
…and fix it the right way.