Symptoms
- Water accumulates on the pool cover without draining
- Pump runs but doesn't move water
- Pump doesn't turn on despite water present
Likely causes
- CommonDebris clogging the pump's intake screenLeaves and dirt on the cover easily block the pump's intake.
- CommonStuck or malfunctioning float switchThe float that triggers the pump can get stuck in the off position from debris or ice.
- PossiblePump motor burned out from running dryCover pumps aren't designed to run without water and can fail if left on too long dry.
- PossibleDischarge hose kinked or frozenA blocked discharge line prevents water from actually leaving even if the pump runs.
What to do
- Remove leaves and debris from around the pump's intake screen.
- Check that the float switch moves freely up and down without obstruction.
- Inspect the discharge hose for kinks, and in cold weather, check for ice blocking the line.
- Test the pump by lifting the float manually while it's plugged into a GFCI outlet to see if it activates.
- If the pump runs but no water moves, check for a clogged impeller inside the pump housing.
- If the motor doesn't respond at all with the float lifted, the pump motor has likely failed and needs replacement.
Tools and parts
- None required for basic checks
Pool cover pumpSearch: “automatic pool cover pump replacement”
When to call a pro
Most cover pump issues are simple enough to DIY, but a pool service can help if water keeps re-accumulating from a cover or drainage design issue.
Safety
Use caution
Always plug cover pumps into a GFCI-protected outlet since they operate in standing water.