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TROUBLESHOOTING
SYMPTOM
Pump won't start.
Pump starts and stops frequently.
Pump won't shut off
Pump operates but delivers little or
no water.
8
POSSIBLE CAUSE
Pump not plugged in
Blown fuse
Low line voltage
Defective motor
Defective float switch
Impeller
Float obstructed
Backflow of water from piping
Faulty float switch
Defective float switch
Restricted discharge (obstacle or ice in piping)
Float obstructed
Restricted intake screen
Low line voltage
Something caught in impeller
Worn or defective parts or plugged impeller
Check valve installed without vent hole
Restricted intake screen
Check valve is installed either backward or upside
down
CORRECTIVE ACTION
Check that pump is plugged into a proper outlet.
If blown, replace with fuse of proper size.
If voltage is under recommended minimum, check size of
wiring from main switch on property. If OK, contact power
company or hydro authority.
Replace pump.
Replace float switch.
If impeller won't turn, remove lower pump body and locate
source of binding.
Remove obstruction.
Install or replace check valve.
Replace float switch.
Replace float switch.
Remove pump and clean pump and piping.
Remove obstruction.
Remove the pump and clean the intake screen and the impeller.
If voltage under recommended minimum, check size of wiring from
main switch on property. If OK, contact power company or hydro
authority.
Remove the pump and clean out the impeller.
Clean impeller if plugged; otherwise replace pump.
Drill a 1/16" - 1/8" (1.6mm-3.2mm) dia. hole between pump discharge
& check valve (1-2" above where the discharge pipe screws into the
pump discharge and below the waterline).
Remove the pump and clean out the intake screen.
Be sure check valve is installed correctly.
MY1000-R (06-22-20)
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