E07
Harris Phase Loss / Phase Imbalance (for 230V models using internal dual-phase drive)

Harris pump display shows E07 and motor does 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

Loose line conductor at terminal block, Open breaker pole on a 2-pole breaker, Damaged power cable, Internal drive failure

How to Fix / Troubleshooting

Safety first: Turn off the 2-pole breaker and verify no voltage is present before opening the wiring compartment.

  • Inspect breaker and wiring: Ensure the 2-pole breaker handle is tied and both poles are ON. Check for signs of overheating or burning at the breaker.
  • Check line voltage on both legs: With power ON and using a multimeter, measure L1 to neutral and L2 to neutral (if available) and L1 to L2. Both legs should show proper voltage. If one leg is missing, replace or repair the breaker or wiring.
  • Inspect terminal block: Turn power OFF. Open the Harris pump electrical cover and verify both line conductors are firmly secured in the terminal block with no corrosion.

If both legs are present and balanced but E07 persists, the internal drive circuitry may be defective and the control module should be replaced.

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Repair Difficulty

Medium 3/5

Required Part

Harris pump terminal block
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