14
TROUBLESHOOTING
Problem
Possible Cause
Corrective Action
Pump will not
start or run.
1. Blown fuse or tripped circuit breaker. 1. If blown, determine cause and then
either replace with properly sized fuse
or reset breaker.
2. Low line voltage.
2. Contact an electrician.
3. Overload is open.
3. Allow motor to cool, and overload to
reset.
4. Motor is defective.
4. Replace pump.
5. Switch is defective.
5. Replace switch.
6. Wiring is incorrect.
6. Plug pump into a working 115V
receptacle.
7. Switch is obstructed.
7. Remove obstruction to ensure free
motion of switch.
8. Impeller is obstructed.
8. Remove screen and volute. Clean
impeller or replace impeller.
Motor overheats
and trips
overload or
blows fuses.
1. Incorrect voltage.
1. Make sure pump is connected to 115V
electrical service.
2. Impeller is obstructed.
2. Remove screen and volute. Clean
impeller or replace impeller.
3. Motor is defective.
3. Replace pump.
Pump starts and
stops too often.
1. Check valve is missing.
1. Install check valve.
2. Switch is defective.
2. Replace switch.
3. Check valve not functioning properly
or leaking.
3. Be sure check valve is installed and
operating properly. Replace check
valve if necessary.
4. Float is too tight on float rod.
4. Clean debris build-up off float rod.
5. Overload is open.
5. Allow motor to cool and overload to
reset.
Pump will not
shut off.
1. Switch is defective.
1. Replace switch.
2. Switch is obstructed.
2. Remove obstruction to ensure free
motion of switch.
3. Discharge pipe is clogged.
3. Remove clog in discharge piping.
4. Water inflow exceeds pump capacity. 4. Recheck sizing calculations to
determine proper pump size.
Pump operates
but delivers little
or no water.
1. Low line voltage.
1. Contact an electrician.
2. Inlet screen clogged.
2. Remove debris.
3. Broken impeller or debris in impeller
cavity.
3. Remove screen and volute. Clean
impeller or replace impeller.
4. Water inflow exceeds pump capacity. 4. Recheck sizing calculations to
determine proper pump size.
5. Check valve is stuck, closed, or
installed backward.
5. Be sure check valve is installed and
operating properly. Replace check
valve if necessary.
6. Vent hole is clogged.
6. Clean vent hole.