Navien Boiler: Run test mode (fan, pumps, zone valves, venturi)
Run test mode (fan, pumps, zone valves, venturi) on a Navien boiler: Test mode switches individual outputs so you can check them one at a time.
Applies to: Navien NHB-H condensing boilers: NHB-150H, NHB-110H, NHB-080H, NHB-055H
How to fix run test mode (fan, pumps, zone valves, venturi): step by step
- Hold Back and Menu together for 3 seconds.
- Choose 6. Test Mode.
- Pick the output: fan motor ramp, boiler/system/zone/DHW pumps, zone valves or dual venturi.
If the unit shows an error code, look it up: Navien Boiler codes
Models
NHB-055HNHB-080HNHB-110HNHB-150H
Source: Navien NHB-H Installation and Operation Manual, 11.7 Viewing Basic Information p.103-104; 11.13 Advanced Menu p.109-118; 11.10 p.108. 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.