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Troubleshooting Guide
Problem
Pump is not plugged in
The float switch is not connected to the controller
Water is not high enough to activate the pump
Open circuit
Poor power source
The pump will not start or run
Low voltage
Bad power cable
Locked impeller
Defective float switch
Defective pump
Locked impeller
Incorrect power supply
Thermal protector tripping or
not functioning
Overburdened due to heavy sand content in the water
Pump running continuously with no water present
Float switch or sensor is mounted too low
Pump starts and stops too
Water flowing back from pipe
frequently
Malfunctioning float switch
Clogged or frozen discharge
Blocked intake strainer
One or both of the floats is obstructed and cannot
drop down
Pump will not shut off
Defective float switch
Check valve installed with no air bleed hole in
pipe or pump
Check valve is stuck or installed upside down
Check valve on secondary pump will not close and
water re-circulates within the system
Worn impeller
Partially blocked impeller
Clogged or frozen discharge
Broken or leaking pipe
Insufficient or no water
volume
Low power voltage
Check valve installed with no air bleed hole in
pipe or pump
Check valve is stuck or installed upside down
Pump is air locked
Check valve on secondary pump will not close and
water re-circulates within the system
Abnormal sound or vibration
Blocked intake screen
Broken impeller
*Consult a licensed electrician.
If the above solutions do not solve the problem, contact Glentronics customer service 800-991-0466.
(Always unplug the pump from the controller before performing any maintenance)
Potential Cause
Solutions
Plug pump in properly (see instructions)
Check connection of the float switch to the controller
Make sure float switch is positioned properly
Check circuit breaker or fuse
Check circuit line wires and cable*
Check line wires and source voltage*
Replace with new cable*
Remove strainer and clear obstruction
Replace float switch with new float switch
Replace pump with new pump
Remove strainer and clear obstruction
Check power supply source and voltage
Use water filter or replace with a higher wattage pump
Check float switch
Raise float switch or adjust timer (Enhanced or Deluxe Controller)
Install or replace check valve
Replace float switch with new float switch
Clear blockage or thaw frozen line
Clear debris from intake strainer
Clear debris from inside the float cage (Loosen nut on top of float, then
remove c-clip on bottom of float. Remove debris. Tighten nut on top of
float, then replace c-clip on bottom of float.) When reassembling the float,
the magnetic strip on the inside of the float should be facing down.
Replace float switch with new float switch
Drill a bleed hole in the discharge pipe, or clean debris from the existing
hole in the pipe or pump
Reverse or replace check valve. Make sure the check valve is installed with
the flow arrow pointing up and out of the pit.
Replace the check valve on the secondary pump
Replace impeller & adjust spacing between impeller and cover
Remove strainer and clear obstruction
Clear blockage or thaw frozen line
Repair piping
Check power voltage, wires and cable condition
Drill a bleed hole in the discharge pipe, or clean debris from the existing
hole in the pipe or pump
Reverse or replace the check valve. Be sure check valve is installed with
flow arrow pointing up and out of the pit.
Remove debris from the air bleed hole
Replace the check valve on the secondary pump
Clear debris from intake screen
Replace impeller with new one
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