Symptoms
- Leaves and debris float on the surface instead of being pulled in
- Water level is at or below the skimmer opening
- Weir door (flap) appears stuck in one position
Likely causes
- CommonWater level too low for the skimmer to draw surface waterThe skimmer needs water at roughly mid-opening height to function correctly.
- CommonFull or clogged skimmer basketA full basket restricts flow even if suction is otherwise fine.
- PossibleStuck weir doorThe small flap that regulates flow into the skimmer can get stuck from debris or sun damage.
- PossibleSuction-side clog or air leak reducing overall flowA broader suction issue will also reduce skimmer performance.
What to do
- Check and adjust the water level to sit around the middle of the skimmer opening.
- Empty and clean the skimmer basket of all trapped debris.
- Check the weir door for free movement, replacing it if it's cracked, warped, or stuck.
- Confirm the pump is running and priming correctly, since a weak pump reduces skimmer draw.
- Check that any suction-side valves are set to include the skimmer line.
- If suction still seems weak after these checks, inspect for an air leak at the pump lid or fittings.
Tools and parts
- None required for basic checks
Pool skimmer weir doorSearch: “pool skimmer weir door replacement”
Skimmer basketSearch: “pool skimmer basket replacement”
When to call a pro
A pool technician can address more complex suction-side issues if basic cleaning and adjustments don't restore skimmer function.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.