E12
Jacuzzi Derate Mode / Parameter Corruption

Pump display shows E12 and the unit runs only at a fixed low speed regardless of 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

Corrupted configuration memory in drive, Incorrect parameter programming, Internal EEPROM failure, Software glitch after power event

How to Fix / Troubleshooting

Safety first: Turn off power before accessing the control panel for service mode operations.

Steps to check:

  • Factory reset: Follow the Jacuzzi service manual to perform a factory reset of the drive parameters.
  • Reprogram speeds: After reset, re-enter desired speed programs and schedules via the keypad.
  • Update firmware (if supported): If Jacuzzi provides firmware updates, apply the latest version using the recommended method.
  • Power cycle: Turn power off for 5 minutes, then restore and test operation.

If E12 or derate behavior persists after a proper reset and reprogramming, the control board's memory is likely failing and the module should be replaced.

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Repair Difficulty

Medium 3/5

Required Part

Jacuzzi pump control board / drive module
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