SF
Hayward
System Fault / General Safety Fault
Display shows SF and pump will not start or shuts down quickly.
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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
Multiple concurrent sensor errors, Internal firmware fault, Severe voltage irregularities, Drive self-test failure
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker.
- Full power reset: Leave the pump de-energized for at least 5 minutes, then restore power and attempt to start.
- Check for other codes: Some Hayward models will show SF after another code. Note any prior codes and address those root causes first (flow, voltage, overheat, etc.).
- Verify supply stability: Ensure the pump is on a dedicated, properly sized breaker with tight connections and no obvious signs of arcing or overheating.
- Environmental check: Inspect for water, insects, or corrosion inside the drive housing.
- Service required: Persistent SF usually indicates an internal drive failure. Replace the drive/control module or motor/drive assembly.
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Repair Difficulty
Professional Required
5/5
Required Part
Drive Control Module
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