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Navien Combi Boiler: Purge air from the heating piping (Air Purge Mode)

Updated · by Aurora Star Tech Inc.

Purge air from the heating piping (Air Purge Mode) on a Navien combi boiler: Air purge mode ends by itself after 15 minutes.

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 purge air from the heating piping (air purge mode): step by step

  1. Hold Back and Menu together for 3 seconds and choose 8. Air Purge Mode.
  2. Choose 1. SH pipe air purge.
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, 11.6.6-11.6.8, p.125-128. 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