WIL-IO-SP-WCC17001-11
7
Pump operates
but pumps little or
no water
1. Debris caught in impeller or pipe
2. Check valve stuck or installed
backward
3. Anti-airlock hole blocked
4. Debris caught in impeller or
discharge
5. Impeller broken
1. Clean out debris
2. Inspect check valve and make sure it’s properly
installed
3. Remove the blockage
4. Remove debris
5. Replace impeller
Pump starts and
stops too often
1. Backflow of water from piping,
check valve leaking
2. Float switch failed
1. Replace check valve
2. Replace switch
Pump will not shu
off
1. Defective float switch
2. Float obstructed
1. Replace switch
2. Remove obstruction
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