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E255MEDIUM

PCB Communication Error (Navien)

Navien boiler control board communication error between main and display PCBs.

What This Error Code Means

The main control board cannot communicate with the user interface display board.

Common Causes

  • Loose connector between PCBs
  • Failed display board
  • Failed main PCB
  • Voltage spike damage
  • Water damage on PCB

Affected Brands

Navien

How ROMA Heating Fixes This

  • Check all connector seating between boards
  • Inspect boards for visible damage
  • Test voltage at board connections
  • Replace display board if unresponsive
  • Replace main PCB if communication fails

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TSBC Gas License LGA0202903. Fully insured and WCB covered.

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Seeing Error Code E255?

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