F25
Aquacomfort Blower Speed / RPM Feedback Fault

Heater displays F25; may coincide with erratic blower speed or noise.

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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

Failed blower speed sensor, Faulty variable-speed blower, Control board blower driver fault

How to Fix / Troubleshooting

Safety first: Disconnect power before working on the blower or control board.

  • Inspect blower harness: Ensure all multi-pin connectors between the blower and control board are secure.
  • Check for obstructions: Remove any debris from the blower wheel that could affect speed.
  • Observe startup: Restore power and call for heat. If the blower surges or fails to reach speed, the motor or driver may be failing.
  • Professional service: Variable-speed blower and control board diagnostics typically require manufacturer-specific tools; contact an Aquacomfort service technician.
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Repair Difficulty

Professional Required 5/5

Required Part

Variable-Speed Blower Assembly
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