Navien NCB-180 User's Information Manual

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Version: 1.00(Oct. 02. 2013)

Navien America, Inc.

20 Goodyear lrvine, CA 92618 TEL +949-420-0420 FAX +949-420-0430 www.navienamerica.com

Getting Service

If your boiler requires service, you have several options for getting service:

●

Contact Technical Support at 1-800-519-8794 or on the website: www.navienamerica.com.

For warranty service, always contact Technical Support first.

●

Contact the technician or professional who installed your boiler.

●

Contact a licensed professional for the affected system (for example, a plumber or electrician).

When you contact Technical Support, please have the following information at hand:

●

Model number

●

Serial number

●

Date purchased

●

Installation location and type

●

Error code, if any appears on the front panel display.

Combination Boiler

User’s Information

Manual

Other manuals for Navien NCB-180

Service Manual149 pages

Installation & Operation Manual77 pages

Quick Installation Guide4 pages

Questions and Answers:

S
Sarah Rodriguez MDAug 20, 2025
Why is my Navien NCB-180 Boiler space heating not working?
- K
  Kimberly WilsonAug 20, 2025
  If you are experiencing issues with the space heating side of your Navien Boiler, here are a few things to check: * Ensure the boiler is powered on and not in standby mode by pressing the Power button and raising the setting temperature. * Verify the setting temperature is appropriately set. * Confirm the system isn't currently running for domestic hot water (DHW), as the heating side will not function simultaneously. * Inspect and clean the filters on the heating side to ensure they are not restricted.
S
Susan StephensAug 22, 2025
Why is the water from my Navien NCB-180 not hot enough?
- Z
  Zoe JohnsonAug 22, 2025
  If the water from your hot water faucet isn't hot enough when using your Navien Boiler, check the boiler’s temperature setting and also check for cross plumbing between the cold and hot water lines.
L
Leah HughesAug 25, 2025
What to do if cold water is coming out when the hot water is opened in Navien NCB-180 Boiler?
- A
  Anthony JonesAug 25, 2025
  If you're getting cold water when you expect hot water from your Navien Boiler, first ensure that the shut-off valves on both the hot and cold water pipes are fully open. Also, if an error code is displayed on your boiler, consult the section on understanding error codes for further guidance.
S
Shane ShermanAug 26, 2025
Why is the set temperature too low on my Navien NCB-180?
- D
  Dylan HouseAug 26, 2025
  If your Navien boiler isn't providing the expected temperature, check the boiler's temperature setting. Also, inspect your plumbing for any cross-connections between the cold and hot water lines, as this can affect the water temperature.
P
parkerbradleyAug 27, 2025
What to do if the set temperature is too high on Navien Boiler?
- J
  Jessica ValdezAug 27, 2025
  If the set temperature on your Navien Boiler is too high, check the boiler's temperature setting.
P
pamelaknappAug 29, 2025
What to do if there is no power to Navien NCB-180?
- J
  Jessica ParkerAug 29, 2025
  To resolve power issues with your Navien Boiler: * Ensure the power is on and that the boiler is plugged into an outlet with the correct voltage. * Press the Power button and increase the setting temperature. * Make sure the boiler is turned on.
L
Lori PruittAug 31, 2025
How to fix E003 error on Navien Boiler?
- J
  Jeremy HaneyAug 31, 2025
  If the Navien Boiler displays error code E003, which indicates an ignition failure, make sure that the main gas supply valve is open.
J
Joseph SavageSep 2, 2025
What to do if Navien NCB-180 Boiler shows E016 error?
- J
  josephwyattSep 2, 2025
  If the Navien Boiler displays error code E016, signaling overheating of the heat exchanger: * Turn off the system for at least 30 minutes, and then restart it. * Clean the Heating Return filter. * Flush the heat exchanger.
J
Jade HubbardSep 4, 2025
Why does my Navien NCB-180 Boiler show E110 error?
- J
  Jason FigueroaSep 4, 2025
  If the Navien Boiler displays error code E110, which means abnormal air pressure, ensure that the exhaust pipe is free of obstructions and clean the intake air filter.
C
Christopher TurnerSep 6, 2025
How to resolve E012 error on Navien NCB-180 Boiler?
- J
  juliaguzmanSep 6, 2025
  If the Navien Boiler displays error code E012, indicating flame loss, you should clean the intake air filter and ensure that the electrical cord is properly grounded.

Navien NCB-180 Specifications

General

Fuel Type	Natural Gas or Propane
Maximum Input	180, 000 BTU/h
Minimum Input	18, 000 BTU/h
Heating Capacity	180, 000 BTU/h
Water Connection Size	3/4" NPT
Gas Connection Size	3/4" NPT
Vent Type	Direct Vent
Domestic Hot Water Flow Rate at 35°F	8.4 GPM
AFUE	95%
Vent Size	2 inch or 3 inch
Electrical Requirements	120V AC, 60Hz

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