Harris Inadequate Circulation / Underspeed Operation

Pump runs but water appears cloudy and circulation seems poor despite normal pressure

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Possible Causes

Variable-speed pump programmed at too low RPM, Incorrect run time schedule, Oversized pool relative to flow rate, Partially clogged filter

How to Fix / Troubleshooting

Safety first: Ensure safe footing and dry hands while adjusting controls.

  • Increase RPM: On Harris variable-speed models, raise the operating speed and observe flow at the returns.
  • Extend run time: Increase daily run time to improve turnover, especially during heavy use or hot weather.
  • Clean filter: Backwash or clean the filter to ensure it is not restricting flow.

Adjust pump programming to achieve at least one full pool volume turnover per day, or more as needed.

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Repair Difficulty

Very Easy 1/5

Required Part

Harris pump control module
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