Pahlen Inadequate Filtration / Undersized Runtime

Pahlén pool pump runs but water appears cloudy and circulation seems poor over time

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Possible Causes

Pump not running long enough each day, Incorrect speed settings on variable-speed Pahlén pump, Dirty filter, Bypassed filtration loop

How to Fix / Troubleshooting

Safety first: Normal operation adjustments only; no internal electrical work required.

  • Increase runtime: Adjust the Pahlén controller schedule to run the pump longer, typically 8–12 hours per day depending on pool size and usage.
  • Optimize speed: On variable-speed models, ensure that the filtration speed is high enough to achieve proper turnover through the Pahlén filter.
  • Check for bypass: Verify that any bypass valves around heaters or filters are not diverting too much flow away from the filter.
  • Maintain filter: Clean or backwash the filter regularly to maintain design flow.
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Repair Difficulty

Very Easy 1/5

Required Part

Control Panel (Timer Settings)
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