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Navien Combi Boiler: Read the error history

Updated · by Aurora Star Tech Inc.

Read the error history on a Navien combi boiler: The last 10 errors are listed in the menu.

Homeowner with a combi boiler problem? Call (647) 657-2977 or book a service call — licensed technicians across Vaughan and the GTA.

Applies to: NCB-250/150H, NCB-240/130H, NCB-240/110H, NCB-190/080H, NCB-190/060H

How to fix read the error history: step by step

  1. Press Menu.
  2. Choose 4. Error History to see the last 10 errors.
Safety: Gas, electrical and refrigerant work must be done by a licensed technician. Turn off power and gas before servicing, never bypass a safety control, and always follow the manufacturer's manual for your exact model.

If the unit shows an error code, look it up: Navien Combi Boiler codes

Models

NCB-190/060HNCB-190/080HNCB-240/110HNCB-240/130HNCB-250/150H

Source: Navien NCB-H Installation & Operation Manual, 11.5.1 Viewing Basic Information, p.113-114. Written in our own words as a summary; always check the original manual.

General guidance for qualified technicians. The manufacturer's installation and service manual and local codes always take priority. Aurora Star Tech is not affiliated with, endorsed by or sponsored by any equipment manufacturer; brand and model names are used only to identify equipment and belong to their owners.

© 2026 Aurora Star Tech Inc. All rights reserved. This page may not be copied, republished or used to train other systems without written permission.

Emergency Boiler Repair

647-657-2977