E07
Rheem
Incorrect Supply Configuration / Phase Loss (for multi‑phase models)
Pump display shows E07 indicating phase error or incorrect supply; motor will not start.
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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
Miswired line connections at Rheem terminal block, One phase missing from three‑phase supply, Incorrect voltage selection jumper or dip switch setting, Loose lug on incoming power feed
How to Fix / Troubleshooting
Safety First: Only qualified persons should work on multi‑phase power. Turn OFF and lock out the breaker before opening the terminal compartment.
- Confirm supply type: Verify the pump nameplate (single‑phase vs three‑phase, voltage rating) matches the actual supply from the panel.
- Check terminal wiring: Remove the Rheem pump terminal cover and confirm L1, L2, and L3 (if present) are connected correctly and tightened to manufacturer torque specs. Look for burned or loose lugs.
- Verify voltage on each phase: With power restored and using a multimeter, measure voltage between each pair of phases. A missing or low phase indicates an upstream supply issue that must be corrected by an electrician.
- Inspect voltage selector: Some Rheem motors have internal jumpers or dip switches for 208/230/460V. Confirm they are set correctly per the installation manual.
- Reset and test: After correcting wiring or supply issues, power cycle the pump and attempt a start. If E07 persists with correct wiring and voltage, the drive electronics may be damaged.
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Repair Difficulty
Hard
4/5
Required Part
Rheem Pump Motor Terminal Block
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