Hayward Unstable Drive Operation or Flow Instability

Pump speed fluctuates up and down without changes to settings.

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Safety Warning

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

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Possible Causes

Air entering pump causing flow changes, Dirty filter causing pressure swings, Faulty speed sensor or feedback circuit, Automation sending conflicting commands

How to Fix / Troubleshooting

Safety first: Turn off power before opening the pump or filter.

  • Eliminate air issues: Check for suction-side air leaks and ensure the pump is fully primed with a solid column of water.
  • Clean filter: Backwash or clean the Hayward filter to stabilize system pressure.
  • Check automation: Review schedules and speed settings in your Hayward automation system to ensure no overlapping programs are changing speeds.
  • Reset drive: Perform a factory reset of the pump’s programming and re-enter desired speeds. If fluctuations persist, the internal drive feedback circuitry may be failing.
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Repair Difficulty

Medium 3/5

Required Part

Drive Control Module
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