This can often be the result of airborne pollutant and is especial prevalentt in areas where there is a lot of heavy trucking nearby.
Ideally you show keep your water level between one third and one half the way up the opening of the skimmer. This is the level at which the skimmer(s) operate most efficiently.
No you just have to get the water level below the skimmer after that you should have no trouble making repairs.
It won't work as a skimmer if your water level is above the skimmer. If you watch how the skimmer works, the water is pulled in over the skimmer door and it won't "skim" the floating debris off the surface of the water if the water level covers the entire opening, your skimmer will just suck in water that is below the surface. If you keep the water level so it's at least below the opening an inch or so, you should be o.k. If you've recently had alot of rain, you may need to drain some water out of the pool so your skimmers function properly.
Could be the water level of the pool is too low. Top up with the hose into the skimmer basket.
The water level needs to be maintained at the middle of the skimmer opening or center of the tile line.
Regardless of the position of any tiles on the pool wall The water level should be about 3 or 4 inches / 75-100mm above the top of the skimmer vein before the skimmer basket or at such a level that it does not suck air through the skimmer. of you have a suction side floating pool skimmer you can let it get as high as you like and as long as it is sealed properly as low as you like.
Drain the pool until the water level reaches two inches below the skimmer faceplate , remove the face plate using a screwdriver , remove the faceplate and skimmer , then replace the gasket and attach the skimmer and then the faceplate
Check you water level. It sounds like you have too much water in your pool. When your pump is running, it is "sucking" water through the skimmer, keeping the water level pulled down inside of the skimmer. When you turn the pump off, the water level pushes back up, causing the skimmer lid to come off.BETTER ANSWER::Totally opposite of the above answer. If the water level is at or below the throat of the skimmer then yes the pool water can vortex in that skimmer causing air to be sucked into the pump. The skimmer basket keeps popping up because of the entrapped air. It has nowhere to go except back to the pool in the direction of least resistance when the pump shuts off. Bring and keep the water at mid level or slightly higher. Add fill water when the water gets to within about one inch of the bottom of the skimmer. Another reason would be that you have an actual suction leak. Suctions leaks are found in the plumbing and/or pump back to the pool on the suction side of the pump. Sometimes the pump seal can leak and cause this. Check under the base of the pump at a place between the pump basket or pot and the motor. If damp, that may be the cause of the air. The air gets into the filter tank then backs up to the pool at the skimmer.K
Too much iron in the water
yes in order for the pump to work the water has to be over it
when your water level is about 6 inches below the item. when your water level is about 6 inches below the item.
I don't know why your skimmer is doing what its doing, However you can lwer the water level in your pool by vacuuming to waste OS backwashing.