Pentair Pentair WhisperFlo Single Speed Pool Pump IMPELLER CLOG Error Fix: Impeller Obstruction

Error code IMPELLER CLOG on the Pentair Pentair WhisperFlo Single Speed Pool Pump means: Impeller Obstruction. Debris such as leaves, acorns, small rocks, or pine needles have passed through the strainer basket and become lodged in or around the impeller. Symptoms include noticeably reduced flow, higher pump noise, and possibly the motor straining or tripping the breaker from increased load. Turn off the pump. Remove the strainer basket and look into the impeller eye for visible debris. Some clogs may require removing the pump volute from the motor to access the impeller directly. Check the strainer basket for cracks that are allowing debris to pass through.

The most successful fix is "Remove Volute and Clear Impeller Obstruction" (medium difficulty, ~45 minutes). Estimated DIY cost: $0-$10. HomeMD has 2 community-ranked fixes for this error.

This error is rated warning severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Remove Volute and Clear Impeller Obstruction") is rated medium difficulty and takes about 45 minutes. Tools needed: Pipe wrench, Socket wrench set, Needle-nose pliers, Flashlight.

DIY cost: $0-$10. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The Pentair Pentair WhisperFlo Single Speed Pool Pump has 7 other known error codes, including: CAPACITOR FAIL (Motor Capacitor Failure), FROZEN VOLUTE (Freeze Damage — Cracked Volute), LID ORING LEAK (Pump Lid O-Ring Leak), MOTOR BEARING WEAR (Motor Bearing Wear), MOTOR OVERHEAT (Motor Overheating), and 2 more.

Error code IMPELLER CLOG also appears on 3 other Pentair models: Pentair IntelliFlo VSF Variable Speed Pool Pump, Pentair IntelliFlo3 VSF Variable Speed Pool Pump, Pentair SuperFlo VS Variable Speed Pool Pump. The fix may vary by model, so check each model's specific page for tailored repair steps.