Navien Error Code Flame Value: Status Information item 15 – Flame Value (Boiler)

Updated October 16, 2026 · by Aurora Star Tech Inc.

Navien error code Flame Value on a boiler means: Status Information item 15 - Flame Value. It is also called Navien diagnostic code Flame Value.

Low severityBoilerNavien NHB-H

Homeowner? What Navien code Flame Value means for you

Usually minor Your boiler is reporting: Status Information item 15 - Flame Value. This code is usually informational or minor. The safe checks below often clear it; call us if it keeps showing up.

Safe things you can check yourself

Check the thermostat: right mode (Heat or Cool), set a few degrees past room temperature, and fresh batteries if it uses them.
Make sure the unit has power: its on/off switch (often looks like a light switch near the unit) is ON and the breaker in the electrical panel is not tripped.
Look at the pressure gauge on the boiler. If it reads much lower than usual or near zero, or water is leaking, call a technician.
Outside, make sure the intake and exhaust pipes or vent cap are not blocked by snow, ice, leaves or a nest.
Check that the boiler gas valve is open (handle in line with the pipe).
Try one reset: turn the power off for 30 seconds, then back on. If the code comes back, stop resetting and call a technician.

Call (647) 657-2977 Book a service call

Licensed technicians serving Vaughan, Toronto and the GTA.

What does Navien error code Flame Value mean?

Flame detector reading (8-bit AD value). A value of 70 or lower means flame on; 175 or higher means flame off. Read-only item 15 in the Status Information menu.

Applies to: NHB-055H, NHB-080H, NHB-110H, NHB-150H

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.

Navien models that use code Flame Value

NHB-055H NHB-080H NHB-110H NHB-150H

Other Navien Boiler codes

Code	Meaning
Exhaust Temp	Status Information item 20 - Exhaust Temp
Fan Current APS	Status Information item 19 - Fan Current APS
Fan Current RPM	Status Information item 17 - Fan Current RPM
Fan Target APS	Status Information item 18 - Fan Target APS
Fan Target RPM	Status Information item 16 - Fan Target RPM
Flame Loss - No. of Times	EMS Data counter 3
Freeze Protection icon	Freeze protection mode active
Gas	Status Information item 26 - Gas
Gas Consumption	Service Status Info item 3 - Gas Consumption
Heat Capacity	Status Information item 2 - Heat Capacity
HEX Overheat - No. of Times	EMS Data counter 2
High Altitude	Status Information item 24 - High Altitude

All Navien Boiler error codes →

Navien code Flame Value: homeowner questions

What does Navien code Flame Value mean?

Status Information item 15 - Flame Value. Flame detector reading (8-bit AD value). A value of 70 or lower means flame on; 175 or higher means flame off. Read-only item 15 in the Status Information menu.

Is it safe to keep using my boiler with code Flame Value?

Usually yes. Code Flame Value is normally minor, but if it keeps coming back have it checked.

Can I reset Navien code Flame Value myself?

You can try one reset (power off for 30 seconds, then on). If Navien code Flame Value comes back, the cause is still there and a licensed technician should check it.

Who can fix Navien code Flame Value near me?

Aurora Star Tech Inc. repairs Navien boilers in Vaughan, Toronto and across the GTA. Call (647) 657-2977 or book a service call online.

Homeowner help: Boiler Not Heating: What to Check

Troubleshooting guides

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Source: Navien NHB-H User's Information Manual (V1.0 Apr 2024), 3.3, p.13-14; Navien NHB-H Installation and Operation Manual, 11.7, p.103-104. 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.