Navien Error Code Space heating temperature: Space heating temperature display (Boiler)

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

Navien error code Space heating temperature on a boiler means: Space heating temperature display. It is also called Navien diagnostic code Space heating temperature.

Low severityBoilerNavien NHB-H

Homeowner? What Navien code Space heating temperature means for you

Usually minor Your boiler is reporting: Space heating temperature display. 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 Space heating temperature mean?

Digits showing the space heating set and current temperature.

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 Space heating temperature

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

Other Navien Boiler codes

Code	Meaning
SH1 Thermostat Status	Input/Output Status item 1 - SH1 Thermostat Status
SH2 Thermostat Status	Input/Output Status item 2 - SH2 Thermostat Status
SH3 Thermostat Status	Input/Output Status item 3 - SH3 Thermostat Status
SH Operation Time	Service Status Info item 1 - SH Operation Time
SH Set Temp	Status Information item 3 - SH Set Temp
Space heating demand icon	Space heating demand
Status Information	Status Information menu
Supply Limit - No. of Times	EMS Data counter 9
Supply Temp	Status Information item 6 - Supply Temp
Sys Return Temp	Status Information item 9 - Sys Return Temp
Sys Supply Temp	Status Information item 8 - Sys Supply Temp
system/Zone3 Pump Status	Input/Output Status item 8 - system/Zone3 Pump Status

All Navien Boiler error codes →

Navien code Space heating temperature: homeowner questions

What does Navien code Space heating temperature mean?

Space heating temperature display. Digits showing the space heating set and current temperature.

Is it safe to keep using my boiler with code Space heating temperature?

Usually yes. Code Space heating temperature is normally minor, but if it keeps coming back have it checked.

Can I reset Navien code Space heating temperature myself?

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

Who can fix Navien code Space heating temperature 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

Condensing/corrosion of conventional boiler All brands · Boiler
No heat or some zones cold All brands · Boiler
Noise All brands · Boiler
Poor heat / circulation All brands · Boiler
Relief valve weeps every cycle / pressure climbs All brands · Boiler
Short cycling / wasted fuel All brands · Boiler
Symptoms of air in system All brands · Boiler
Uneven heating All brands · Boiler
Won't fire All brands · Boiler
Annual service checklist - Navien NHB-H Navien · Boiler
Change gas type with DIP switch 2 Navien · Boiler
Change installer parameters (password 1234) Navien · Boiler
Check input and output states (Input/Output Status) Navien · Boiler
Force a fixed firing rate with DIP switch 1 Navien · Boiler
Force minimum or maximum firing (special operations) Navien · Boiler
No space heat - Navien NHB-H / NFB-H Navien · Boiler
Open the service / installer menu (Back + Menu) Navien · Boiler
Purge air from the heating or DHW piping (Air Purge Mode) Navien · Boiler
Read live data (Status Information menu) Navien · Boiler
Read the error history Navien · Boiler
Relief valve discharging - Navien NHB-H / NFB-H Navien · Boiler
Remove a cascade (Cascade System Removal) Navien · Boiler
Reset one parameter to its default Navien · Boiler
Run test mode (fan, pumps, zone valves, venturi) Navien · Boiler
Set the altitude with DIP switch 2 Navien · Boiler
Set up a cascade (assign sub unit IDs) Navien · Boiler

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.