Navien Boiler: Force minimum or maximum firing (special operations)
Force minimum or maximum firing (special operations) on a Navien boiler: Special operations hold the burner at a fixed rate; they return to normal automatically after 3 hours.
Applies to: Navien NHB-H condensing boilers: NHB-150H, NHB-110H, NHB-080H, NHB-055H
How to fix force minimum or maximum firing (special operations): step by step
- Hold Back and Menu together for 3 seconds.
- Choose 7. Special Operations.
- Pick Normal, 1st MIN, 1st MAX, 2nd MIN or 2nd MAX.
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.