Er3
Hayward
Internal EEPROM / Memory Error
Display shows Er3 and pump will not run.
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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
Corrupted configuration memory, Voltage spike or surge, Failing control PCB, Static discharge damage
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker.
- Factory reset: Consult your specific Hayward pump manual for the procedure to restore factory defaults from the keypad. Perform a reset and reprogram schedules and speeds.
- Power conditioning: Consider installing a surge protector on the pump circuit to prevent future memory corruption from spikes.
- Check for moisture: Remove the control cover and inspect the PCB for corrosion or water marks. Any sign of moisture indicates the drive may need replacement.
- Persistent Er3: If the error returns after a reset, the control PCB’s memory is likely damaged and the drive/control module should be replaced.
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Repair Difficulty
Professional Required
5/5
Required Part
Control PCB / Drive Module
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