MAINTENANCE
Troubleshooting
13
Troubleshooting
Problem
Probable Causes
Corrective Action
Pump does not turn on
Pump not connected to electrical
power.
Connect pump to a dedicated circuit equipped with GFCI.
Circuit breaker off or fuse removed.
Turn on circuit breaker or replace fuse.
For models equipped with diaphragm
switch: Breather tube kinked, pinched
or blocked.
Confirm power cord is not kinked or pinched and confirm that
breather tube end opening is not blocked.
For models equipped with tethered
float switch: Accumulation of trash or
build-up on float.
Clean float.
For models equipped with tethered
float switch: Float obstruction.
Check float path and provide clearance.
Defective switch.
Replace switch.
Defective motor.
Replace pump.
Pump will not shut off
Float obstruction.
Check float path and provide clearance.
Pump is air locked due to missing or
clogged air relief hole.
If missing, drill an air relief hole as described in
. If clogged, clean obstruction from air
relief.
Liquid inflow matches pump capacity.
Larger pump required.
For models equipped with diaphragm
switch: Breather tube kinked, pinched
or blocked.
Confirm power cord is not kinked or pinched and confirm that
breather tube end opening is not blocked.
Defective switch.
Replace switch.
Pump runs but does not
discharge liquid
Check valve installed backwards.
Check flow indicating arrow on check valve body to ensure
proper installation.
Check valve stuck or plugged.
Remove check valve and inspect for proper operation.
Lift too high for pump.
Check rated pump performance.
Inlet to impeller plugged.
Pull pump and clean.
Pump is air locked due to missing or
clogged air relief hole.
If missing, drill an air relief hole as described in INSTALLA
-
TION. If clogged, clean obstruction from air relief hole.
Pump does not deliver
rated capacity
Lift too high for pump.
Check rated pump performance.
Low voltage, speed too slow.
Check that supply voltage matches the nameplate rating.
Impeller or discharge pipe is clogged.
Pull pump and clean. Check pipe for scale or corrosion.
Impeller wear due to abrasives.
Replace pump.
Pump cycles continu
-
ously
No check valve in long discharge pipe
allowing liquid to drain back into basin.
Install a check valve in discharge line.
Check valve leaking.
Inspect check valve for correct operation.
Basin too small for inflow.
Install larger basin.
Water sprays out of a
hole in the base of the
unit.
This pump comes with a bleed hole
that allows trapped air to escape from
the pump, preventing air lock.
Water spraying out of this hole is com
-
pletely normal.
No corrective action is required.