Swimming pool solar cover reels

Booster pump is off, or filter pump is off.
Booster pump has an air lock or failed shaft seal.
Drive belts or wheel axles are broken or loose.
WMS (Water Management System) has disconnected or broken hoses.
Feed hose or sweeper tail has splits or holes.
Pool toys or sticks have become wedged between wheels and body.
String or wire has gotten all 'wrapped around the axle'.
Back-up valve is malfunctioning,swimming pool solar cover roller constantly releasing water.
Inline strainers are clogged
Small bits of sand or grit have worked themselves into the WMS, clogging tiny orifices.
Suction Cleaners: Kreepy, Baracuda, Hayward
Low suction pressure, improve draw by closing drain and other suction lines.
Dirty pump basket or skimmer basket,robotic automatic pool cleaners or inline strainer basket.
Cleaner stuck onto high spot in the pool floor.
Cleaner stuck onto floor drains or pop-up in-floor cleaner heads.
Air leaks in cleaner hose, or on pipes in front of filter pump.
Clog in the cleaner head or hose, check for obstruction.
Low or high pool filter pressure gauge readings, indicating flow problems.
Bad connection to skimmer, not making a tight seal of hose to skimmer
Problems with automatic bypass valve or skimmer connection devices.
Failed or stuck diaphragm or flapper in the cleaner head.