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TROUBLESHOOTING
Diagnosing certain symptoms may require close interaction with, or in close proximity to,
components that are energized with electricity. Contact with electricity can cause death, personal
injury or property damage. When troubleshooting the pump, diagnostics involving electricity should be performed by a
licensed professional.
Problem
Possible Cause
Pump failure
Pump will not prime - Air leak, too much
air
Pump will not prime - not enough water
Pump strainer gasket is clogged
Pump strainer gasket is defective
Reduced capacity
Air pockets or leaks in suction line
and/or head
Clogged impeller
Pump strainer clogged
Pump fails to start
Main voltage is not present
Pump shaft is locked
Pump shaft is damaged
Pump runs then
Over temperature FAULT
stops
Over current FAULT
Pump is noisy
Debris in contact with fan
Debris in strainer basket
Loose mounting
Pump runs without
Impeller is loose
flow
Air leak
Clogged or restricted plumbing
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Corrective Action
Check suction piping and valve glands on any suction
gate valves. Secure lid on pump strainer pot and be
sure lid gasket is in place. Check water level to be sure
skimmer is not drawing air.
Be sure the suction lines, pump, strainer, and pump
volute are full of water. Be sure valve on suction line is
working and open (some systems do not have valves).
Check water level to make sure water is available
through skimmer
Clean pump strainer pot.
Replace gasket
Check suction piping and valve glands on any suction
gate valves. Secure lid on pump strainer pot and be
sure lid gasket is in place. Check water level to be sure
skimmer is not drawing air.
Turn off electrical power to the pump.
Disassemble (see 'Pump Disassembly')
Clean debris from impeller. If debris cannot be
removed, complete the following steps:
1. Remove left hand thread anti-spin bolt and o-ring.
2. Remove, clean and reinstall impeller.
Reassemble (See 'Pump Reassembly')
Clean suction trap.
1. Replace fuse, reset breaker/GFCI.
2. Tighten main wire connections
Check if the pump can be rotated by hand and remove
any blockage.
Replace pump.
Check that back of pump is free from dirt and debris.
Use compressed air to clean.
Pump will automatically restart after one (1) minute.
Check that back of pump is free from dirt and debris.
Use compressed air to clean.
Clean strainer basket.
Check that mounting bolts of pump and pump are tight.
Check that pump is spinning by looking at fan on
back of Variable Speed Pump. If so, check that pump
impeller is correctly installed.
Check plumbing connections and verify they are tight.
Check for blockage in strainer or suction side piping.
Check for blockage in discharge piping including
partially closed valve or dirty pool filter.
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