Quick Answer
Skimmers stop working primarily due to improper water level or clogged baskets. First ensure water is at mid-skimmer height. Clean both skimmer and pump baskets thoroughly. Check if weir door moves freely. Verify skimmer valve is fully open at equipment. If still no suction, test for clogged line by closing main drain - all suction should transfer to skimmer. Professional help needed for line clogs.
How Skimmers Work
Skimmer Function & Components
Key Components:
- •Weir Door: Creates water flow velocity
- •Basket: Catches debris before pipes
- •Throat: Narrow opening increases suction
- •Equalizer Line: Prevents air if water drops
Proper Operation:
- ✓Strong surface current into skimmer
- ✓Debris pulled in from 8-10 feet away
- ✓Weir door creating vortex action
- ✓No floating debris after 1 hour
Skimming Efficiency:
Properly functioning skimmers remove 80% of debris before it sinks. This prevents algae nutrients from decomposing in pool, reduces filter load, and maintains cleaner water with less chemical use.
Why Skimmers Fail
1. Water Level Issues (40% of problems)
Most common and easiest to fix:
- Too low - skimmer sucks air
- Too high - no skimming action
- Fluctuating levels from leaks
- Evaporation in summer heat
- Splash out from heavy use
2. Clogs and Blockages (35% of problems)
Flow restrictions at various points:
- Basket packed with leaves
- Debris under basket
- Clogged skimmer line
- Closed or restricted valve
- Impeller clog affecting suction
3. Mechanical Failures (25% of problems)
Component damage or wear:
- Stuck or missing weir door
- Cracked skimmer throat
- Broken basket allowing bypass
- Air leak at skimmer gasket
- Equalizer line problems
Step-by-Step Diagnosis
Check Water Level
Water must be at middle of skimmer opening (halfway up the mouth). Low water prevents skimming action and can cause pump to suck air. High water reduces skimming efficiency. Adjust level first before other diagnostics.
⚠️ Warning: Very low water can damage pump from air entrainment.
💡 Pro Tip: 1 inch too low or high significantly affects performance.
Inspect Skimmer Basket
Remove and empty skimmer basket. Check for cracks allowing debris to pass through. Look for debris wrapped around basket bottom. Ensure basket sits properly in skimmer well. Full baskets block all flow.
⚠️ Warning: Broken baskets let debris clog pipes.
💡 Pro Tip: Leaves can form solid mat invisible from above.
Test Weir Door Operation
Weir (flap door) should move freely, floating at 45° angle. Stuck weir prevents proper skimming action. Remove and check hinge pins, spring tension. Missing weir reduces skimming efficiency by 50%.
⚠️ Warning: Stuck weir can indicate cracked skimmer throat.
💡 Pro Tip: Weir should 'click' back and forth easily.
Verify Valve Positions
Locate skimmer valve at equipment pad. Should be fully open for normal operation. If multiple skimmers, check all valves. Test by closing main drain valve - all suction should go to skimmer(s).
⚠️ Warning: Never run pump with all suction valves closed.
💡 Pro Tip: Valves may be partially closed without appearing so.
Check for Line Blockage
With pump off, use garden hose to reverse flush skimmer line from equipment pad. If water doesn't flow freely, line is clogged. Can also test by feeling suction at skimmer with pump running.
⚠️ Warning: Severe clogs require professional cleaning.
💡 Pro Tip: Skimmer sock over basket prevents most clogs.
Step-by-Step Troubleshooting
Systematic Diagnosis Process:
- 1.
Quick Visual Check
Water level correct? Basket visible debris? Weir door present?
- 2.
Clean Everything
Remove and clean skimmer basket, pump basket, and check impeller
- 3.
Test Suction
Hand over skimmer - should feel strong pull
- 4.
Isolate Skimmer
Close main drain valve - all suction to skimmer
- 5.
Check for Clogs
If still weak, line likely clogged - needs professional clearing
Skimmer Safety Precautions
- •Never reach deep into skimmer with pump running
- •Powerful suction can trap hands or hair
- •Turn off pump before removing baskets
- •Watch for snakes/spiders in skimmer wells
- •Broken skimmer edges are sharp
- •Children should never play near skimmers
Professional Skimmer Service
How CoOpPools Restores Skimmer Function
Complete System Analysis
Test all skimmers, valves, and overall circulation patterns
Professional Line Clearing
High-pressure jetting removes stubborn clogs safely
Component Repair/Replace
Fix weir doors, replace baskets, repair minor cracks
Leak Detection
Find and seal air leaks affecting skimmer performance
Flow Optimization
Adjust valves and returns for maximum skimming efficiency
Preventive Value: Properly functioning skimmers prevent 80% of debris from sinking, reducing filter cleaning, chemical use, and overall maintenance time.
Cost Information
🔧 DIY Attempt
⚠️ Risks:
- • Missing underlying clogs
- • Damaging skimmer components
- • Creating air leaks during work
- • Incomplete diagnosis of issues
👷 Professional Service
✅ Includes:
- • Complete skimmer inspection
- • Line clearing if needed
- • Component replacement
- • Flow optimization
- • Preventive recommendations
Detailed Cost Breakdown
Item/Service | Low | High |
---|---|---|
Service Call | $50 | $75 |
Basic Cleaning | $25 | $50 |
Parts (basket, weir) | $0 | $50 |
Line Clearing | $0 | $75 |
Total Range | $75 | $250 |
💰 Value Tip: CoOpPools offers transparent pricing with no hidden fees. Our worker-owned model means fair prices and invested service.
Prevention Tips
Maintaining skimmer function prevents surface debris accumulation and reduces overall pool maintenance. These simple steps ensure efficient operation.
Maintain Proper Water Level
Keep water at mid-skimmer height always. Mark proper level on skimmer face. Check weekly and after rain/splash out. Install auto-fill valve to maintain level automatically. Low water is #1 skimmer problem.
Regular Basket Cleaning
Empty skimmer baskets weekly minimum, daily during fall. Use skimmer socks to catch fine debris. Replace cracked baskets immediately. Consider larger capacity baskets for heavy debris loads.
Weir Door Maintenance
Inspect weir door monthly for proper operation. Lubricate hinges with silicone spray. Replace broken or missing weirs promptly. Properly functioning weir doubles skimming efficiency.
Professional Line Cleaning
Annual inspection and cleaning of skimmer lines prevents major clogs. Includes checking for root intrusion, clearing minor blockages, and verifying proper flow rates.
🏊 Pro Tip: Regular professional maintenance prevents 90% of pool problems.Get your maintenance quote today
Related Pool Problems
Low Water Level
Often RelatedPrimary cause of skimmer problems
Pump Not Priming
Often RelatedCan result from skimmer air leaks
Clogged Lines
Often RelatedSkimmer line blockage
Low Flow Rate
Sometimes RelatedPoor skimmer performance symptom
Surface Debris
Sometimes RelatedResult of poor skimmer function
Air in System
Sometimes RelatedOften enters through skimmer
💡 Did You Know? Pool problems often occur together.skimmer not working can lead to or be caused by these related issues. Understanding the connections helps prevent future problems.
Need Professional Help?
Don't let debris accumulate on your pool surface. Our technicians will restore proper skimmer function and ensure efficient surface cleaning year-round.
Mention "skimmer issues" when calling for faster service
Frequently Asked Questions
Why is my pool skimmer not working?
Pool skimmers fail to work due to: clogged baskets (most common), closed skimmer valve, water level too low, clogged skimmer line, weir door stuck, air leak in skimmer, or suction diverted to main drain. Start by checking basket and water level.
How do I fix a pool skimmer with no suction?
To restore skimmer suction: 1) Clean skimmer and pump baskets, 2) Check water level is mid-skimmer, 3) Verify skimmer valve is open, 4) Test for clogs by blocking other suction lines, 5) Check for air leaks around skimmer. If still no suction, line may be clogged.
Can a pool run without the skimmer?
Pools can run using main drain only, but it's not ideal. Skimmers remove surface debris before it sinks, maintain water circulation patterns, and house automatic chlorinators. Without skimmer function, debris accumulates, water quality suffers, and cleaning increases.
How much does it cost to fix a pool skimmer?
Skimmer repair costs vary: cleaning clogs $75-150, replacing weir door $50-100, fixing minor cracks $200-400, replacing skimmer basket $20-50, or complete skimmer replacement $1500-3000. Most issues are simple clogs resolved quickly.