Navien Error Code Outdoor reset icon: Outdoor reset enabled (Boiler)

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

Navien error code Outdoor reset icon on a boiler means: Outdoor reset enabled. It is also called Navien diagnostic code Outdoor reset icon.

Low severityBoilerAlso Combi BoilerNavien NHB-H

Homeowner? What Navien code Outdoor reset icon means for you

Usually minor Your boiler is reporting: Outdoor reset enabled. 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 Outdoor reset icon mean?

Shown when the Outdoor Reset feature is enabled.

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 Outdoor reset icon

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

Other Navien Boiler codes

Code	Meaning
Main F/W Ver	Status Information item 27 - Main F/W Ver
Main Menu	Main menu
Model	Status Information item 25 - Model
Operation State	Status Information item 1 - Operation State
Outdoor Reset	Status Information item 21 - Outdoor Reset
Outdoor Reset Curve	Status Information item 22 - Outdoor Reset Curve
Outdoor Temp	Status Information item 10 - Outdoor Temp
Outdoor temperature	Outdoor temperature display
Panel F/W Ver	Status Information item 28 - Panel F/W Ver
Return Temp	Status Information item 7 - Return Temp
Service menu	Advanced / service menu (Back + Menu)
SH1 Thermostat Status	Input/Output Status item 1 - SH1 Thermostat Status

All Navien Boiler error codes →

Navien code Outdoor reset icon: homeowner questions

What does Navien code Outdoor reset icon mean?

Outdoor reset enabled. Shown when the Outdoor Reset feature is enabled.

Is it safe to keep using my boiler with code Outdoor reset icon?

Usually yes. Code Outdoor reset icon is normally minor, but if it keeps coming back have it checked.

Can I reset Navien code Outdoor reset icon myself?

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

Who can fix Navien code Outdoor reset icon 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

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Source: Navien NHB-H User's Information Manual (V1.0 Apr 2024), 2.3.1 Icons and Digital Display, p.7. 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.