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Tankless water heater recalled due to carbon monoxide risk.

Navien Recalls Tankless Water Heaters and Boilers Due to Risk of Carbon Monoxide Poisoning

Name of product:

Navien condensing tankless water heaters and combination boilers


A kit installed on the tankless water heaters and boilers to convert them from natural gas to propane can cause the unit to produce excessive amounts of carbon monoxide, posing a risk of carbon monoxide poisoning to consumers.

Remedy: Replace

Recall date: December 20, 2018

Units: About 3,400

Consumer Contact:

Navien at 800-244-8202 from 8 a.m. to 5 p.m. PT or e-mail or online at for more information.


This recall involves only Navien condensing tankless water heaters and combination boilers with model numbers NPE-180A, NPE-180S and NCB-180E that have been or will be converted from using natural gas to propane gas. The recalled water heaters and combination boilers were manufactured between July 9, 2018 through October 14, 2018. The manufacturing date is identified within the serial number. The serial number is printed on a label which is affixed to the side of the unit and on the product packaging. The first two digits identify the year, the next single digit identifies the month, and the last two digits identify the day. For example, 18709 stands for July 9, 2018. X stands for October.

Product Model UPC Code Serial Numbers with date of Manufacture

Navien Condensing

Tankless Water Heater NPE-180A 884954974101 7410x18709xxxx 7410x188xxxxxx

7410x189xxxxxx 7410x18X14xxxx

Navien Condensing

Tankless Water Heater NPE-180S 884954974194 7419x18709xxxx 7419x188xxxxxx

7419x189xxxxxx 7419x18X14xxxx

Navien Condensing

Combination Boiler NCB-180E 884954966083 6608x18709xxxx 6608x188xxxxxx

6608x189xxxxxx 6608x18X14xxxx

Serial Number Location


Consumers should immediately stop using the recalled water heaters and boilers that are using propane gas and contact Navien for a free replacement conversion kit. Consumers who continue use of the water heaters and boilers while awaiting repair, should have a working carbon monoxide alarm installed outside of sleeping areas in the home.

Incidents/Injuries: None

Sold At: Wholesale distributors to installers nationwide from August 2018 through October 2018 for about $1,400 to $1,700 for water heaters and $3,800 for combination boilers.

Manufacturer(s): Kyung Dong Navien Co. Ltd, South Korea

Importer(s): Navien Inc., of Irvine, Calif.

Manufactured In: South Korea

Recall number: 19-057

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