Peerless Display / User Interface Failure

Boiler display is blank or unreadable but boiler still runs

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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

Failed display module, loose ribbon cable, low control voltage, moisture damage

How to Fix / Troubleshooting

Safety first: Turn off power before removing the control cover.

Steps:

  • Inspect connections: Reseat the ribbon cable or harness between the display and main control.
  • Check for moisture: Dry any condensation or water near the control.
  • Verify low-voltage supply: Ensure the control transformer is providing correct voltage.
  • Replace display: If wiring and voltage are good, replace the Peerless display module or full control as specified.
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Repair Difficulty

Medium 3/5

Required Part

Display module
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