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                                 SUMP PUMPS TROUBLE SHOOTING CHART

For more on this subject go to:

Sump Pump Trouble Shooting At

Solution to a Wet basement

  Sump Pump Trouble Shooting

Chart in PDF

 

There is nothing worst than coming home to find your basement flooded because your sump pump failed.
While most sump pumps are not continuous duty they are the top of the list when it comes to failure.
Sump pumps have to deal with sand, rock, hard objects, as well as waste.
Before an initial investigation of a failed pump kill the power to do visual inspection keep in mind that waste water is highly conductive.
Trouble Shooting
Check to make sure power is on.
Look for object blocking float or float switch movement restricted float or float switch can make a system over fill causing flooding, or it can make a pump continually run.
Stuck float or float switch can be detected many times by simply kicking the pump, the may start to run. However, pump with no external part may need shop repair because of motor brushes and internal switches.
Below is a Sump Pump Trouble Shooting Chart

 

 

PUMPS

 TROUBLE SHOOTING CHART A

Match the Cause letter with the Correction letter.

Problem

Cause

Correction

 

 

Right Arrow: Pump will not run.

Note: Always turn off power before servicing.

 

A) Blown fuse, broken wire, switch contacts dirty, disruption of power or improper voltage.

B) Float or switch stuck.

C) Defective switch.

D) Water low.

L) Pump no good.

 

A) Check fuse, check for broken wires, make sure cord plugged in all the way, clean contacts with contact cleaner, may be dual voltage pump, see wiring directions call electrician.

B) Reposition pump so float or switch have proper clearance, clean switch with contact cleaner, clean and lubricate float rod.

D) Make sure the water level   rises enough to activate switch, pump not set deep enough.

C) Replace switch.

E) Clear discharge line. Make sure pipe is same size from the pump to the end of discharge pipe.

F) Repair or replace check valve, repair pump leak, also see (J Chart B).

N) Some larger or older pumps have bleeder valves, open bleeder to prime or pour water down pipe to load pump and line with water.

 

Right Arrow: Pump runs or hums, but does not pump water.

E) Pipe is blocked, line too small, or restricted.

F) Check valve is stuck closed or installed

Backwards, pump leaks.

G) Valve is closed.

H) Too much lift for pump's capability, too much vertical run.

I) Pump impeller is jammed or impeller shaft broken.

N) Prime pump.       

 

 

 

PUMPS

 TROUBLE SHOOTING CHART B

Problem

Cause

Correction

Right Arrow: Pump will not turn off.

B) Float stuck or obstructed.

C) Shorted switch.

R) Pump too small.

P) Lower water table

 

G) Open valve.

H) May need larger pump, or try running piping to a lower level.

I) Cut power remove the pump, disconnect the pump and clear or repair impeller.

J) Tighten screws or bolt on pump, replace gaskets.

K) Replace or repair impeller or pump.

L) Repair or replace pump or bearing.

M) Isolate or insulate pipes running between wall and past other objects.

O) Replace pump if sensor float type, replace float on rod.

P) Lower water table with French drain or raise pump.

Home may be over under ground spring. See note below.

Q) Change brushes.

R) Replace pump.

 

Right Arrow: Pump runs from time to time when
not in use.

J) Leaking pump.

F) Check valve leaking.

A) Water high enough but system has intermitting electrical problem.

Right Arrow: Pump operates noisily.

I) Something wedged in the impeller housing.

K) Broken impeller.

L) Worn bearings.

M) Piping mounting brackets too tight or pipe needs isolation for sound.

Right Arrow: Pump runs sluggish or shuts off.

Q) Motor brushes may be too short.

R) Motor weak.

R) Pump too small

Text Box: Pumps should be set just below the basement floor slab. Setting a pump too low can cause you to pick up unwanted water, like from an under ground spring.

 

 

 

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