Pool Troubleshooting /
Why Is There No Suction in My Pool Skimmer?
No suction at the skimmer usually comes from low water, a clogged basket, a stuck weir, a closed valve, or loss of prime. Start with safe, simple checks.
Archive date: this article was written for PoolSkimmer on Oct 7, 2026 and given the earlier archive date of Dec 7, 2025 so the blog reads as an organized archive. It was not published on that date.
In Brief
A lack of suction in the pool skimmer is most often a straightforward matter. One will typically find the culprit in a low water level, an overfull skimmer or pump basket, a valve that is closed or not set right, a line that is blocked, or a pump that has gone out of prime. There are times when the skimmer is still moving water but fails to pick up debris; do not confuse that with a genuine loss of suction.
Safety is paramount. Before handling any basket, shut down the pump and put on the appropriate PPE as the equipment manual dictates. Under no circumstances should one put a hand into operating suction equipment.
Water Level and Skimmer: The First Place to Look
The deck is where you can rule out the simple causes.
Verify the pump is running and the system is configured for the skimmer, assuming your manual permits valve adjustments. Check that the weir door is not stuck and can do its job. Most importantly, ensure the water is high enough for the skimmer to draw from. A common reason for the skimmer to stop pulling is if the level has fallen too far, causing it to take in air rather than a consistent flow of water.
Also make a visual check for any toys or leaves making their way into the skimmer basket.
Safely Clearing the Flow
Turn off the pump before you open the skimmer lid to take out the basket. Inspect the pump strainer or basket as well if your setup includes one. Put everything back in place properly once done.
What you might find:
- Debris in the skimmer basket obstructing the way to the pump.
- A pump basket in need of cleaning, which in turn weakens the skimmer’s pull.
- A weir that is jammed, preventing surface matter from going in.
- A basket lid that is not seated well, allowing debris to get by.
Resist the urge to force parts or second-guess where a valve should be; let the circulation system manual be your guide.
Is It Really a Suction Issue?
Homeowners will sometimes report a non-working skimmer when the truth is the debris capture is just poor. You may have the pump running but see leaves drifting by the opening. This is more of a circulation problem than a vacuum failure and can be caused by:
- Water levels that are either too high or low
- A return jet that is directing debris away
- A weir door that is not up to snuff
- A basket that is warped, cracked or out of position
There is still some suction present, but the skimmer is not being efficient about it.
Air Leaks and Blockages
Should you see the pump lose prime or the flow become erratic, there is likely air in the line or a blockage in the skimmer or suction line. Indicators include gurgling coming from the skimmer, bubbles in the pump basket, or a motor that is sounding strained. If you have cleaned the baskets and there is little to no water flow, the issue is deeper.
Never try to clear a live blockage with your hands or open plumbing while the pump is on.
Time to Bring in a Pro
If the suction remains feeble after you have corrected the water level and given the system a good cleaning, or if you think there is a clog in an underground line, a bad seal or fitting, or trouble with the impeller, make a call to a qualified professional.
Any sign of electrical trouble, a burning odour, or anything that would put the safety of the pool water at risk warrants immediate attention from an expert. Do not allow anyone in the pool until the equipment is safe. While a methodical check will usually put things right, hidden plumbing or persistent prime loss is best left to someone with the proper tools.