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TROUBLESHOOTING
Problem
Possible Cause
Motor runs, but
1. Air locked pump
delivers little or
no water
2. Gas or air in well water
3. Low water level in well or pumping too
4. Defective or improperly installed check
5. Leak in drop pipe damaged section
6. Pump inlet screen blocked
7. Worn pump
8. Broken pump shaft or motor shaft or worn
Pump operates
1. Pressure switch
properly, but
won't shut off
2. Low water level
3. Leak in drop pipe or worn pump
Pump starts too
1. Pressure switch
often
2. Air volume in tank incorrect
3. Check valve defect or leak in drop pipe
much from well
valve
coupling
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Corrective Action
1. Normal delivery may resume if water
pump is started and stopped at one
minute intervals
2. Connect hose to service valve. Run
water thru hose submerged in water in
clear jar. Observe for air bubbles from
hose outlet. If tank is standard type, the
air volume control may be defective -
replace; otherwise, have well checked
for proper water level as pump may be
drawing air. Lower pump and/or correct
well condition
3. Throttle pump with gate valve. Lower
pump setting if depth of well is adequate
4. Pump must be raised to replace or
reinstall correctly
5. Raise pump, check pipe for leak and
replace
6. Raise pump and clean screen. Verify
that well is clean. Reset pump at less
depth if possible
7. Pull pump and replace damaged
components
8. Pull pump, inspect shafts and coupling
for damage. Replace defective
components
1. Readjust switch to lower shut off
pressure setting, clean contacts or
replace switch
2. Throttle pump outlet at gate valve or
readjust pressure switch to lower shutoff
pressure setting
3. Throttle pump output at gate valve or
readjust pressure switch to lower shut
off pressure setting. If pump does not
shut off, pump must be raised and
defect repaired
1. Readjust switch to wider operating
pressure limits; replace defective switch
2. Check pressure in tank. Set at 2 lbs.
below turn on pressure of the pressure
switch. i.e. 30/50 pressure switch should
have tank pressure of 28 lbs.
3. Throttle pump output at gate valve. If
pump does not shut off, pump must be
raised and defect repaired
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