E017
Lochinvar Internal Communication Error (Display to Main Board)

Display shows E017; unit may shut down during operation with no obvious mechanical issue.

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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 communication cable between display and main board, Damaged display module, Faulty main control board

How to Fix / Troubleshooting

Safety: Turn off power before opening the front panel or control compartment.

Steps:

  • 1. Access control panel: Remove the front cover to expose the user interface and main control board.
  • 2. Check communication cable: Locate the ribbon or harness cable between the display and main board. Reseat both ends and inspect for damage or corrosion.
  • 3. Inspect display module: Look for cracked circuit boards, moisture, or burned components on the display module. Replace if visibly damaged.
  • 4. Test operation: Restore power and see if E017 clears. If the error persists with a known-good display and cable, the main control board likely needs replacement.
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Repair Difficulty

Medium 3/5

Required Part

Display Control Module
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