S Symptom Possible Cause(s)
C Corrective Action
Pump will not start or run
.Blown fuse
If blown, replace with proper sized
fuse or reset breaker
.Low line voltage
Contact an electrician
Worn brushes
Replace brushes
Impeller blocked
Remove blockage
Defective motor
Replace pump
Pump will not prime or retain
prime after operating
Air leak in suction line
Repair or replace suction line (use
plumbers tape to install garden hose
adapter fittings and priming plug
onto pump body)
Impeller blocked
Remove blockage
Worn seal
Replace seal
Suction lift too high
Lower pump
Hose kinked or looped
Straighten hose
Fittings not tight
Tighten fittings
Suction hose out of water Submerge suction hose end
Clogged inlet Clean inlet
Flow rate is too low
Piping or hose is fouled or damaged Clean or replace
Low line voltage Contact an electrician
Seal leaks
Worn seal Replace seal
Backhead damaged or cracked Replace backhead
Insure proper assembly and no
obstruction, tighten bolts
Thermal Protector Tripping
Damage or misalignment causing rotating
parts to bind
Take to motor repair shop or locate
and repair mechanical binding
High surrounding temperature Provide a shaded, well-ventilated
area for pump
Low line voltage Contact an electrician
Motor housing air-vents blocked Remove air-vent blockage
Pump head loose on motor
TROUBLESHOOTING CHART
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