Product Safety Recalls

Product Recall Tracker

Lochinvar, A.O. Smith and State Industries brand condensing residential boilers

Description: This recall includes residential condensing boilers, combi boilers and packaged systems sold by Lochinvar from August 2021 through August 2023. They were sold under the Lochinvar, A. O. Smith, and State Industries brand names and have serial numbers within the range of 125325485 through 134830284. The brand name is printed on the front of each unit. The model number and serial number can be found on the data plate on the product located on the unit's rating plate, which is located either on the inside or outside of the outer jacket of the unit. The following brands and model numbers are included in the recall. Lochinvar Brand NCF110L NCF110N NCF150L NCF150N NCF199L NCF199N NKB080L NKB080N NKB110L NKB110N NKB150L NKB150N NKB199L NKB199N NKC110L NKC110N NKC150L NKC150N NKC199L NKC199N A. O. Smith Brand ACB 110H-N ACB 110H-P ACB 110S-N ACB 110S-P ACB 150H-N ACB 150H-P ACB 150S-N ACB 150S-P ACB 199H-N ACB 199H-P ACB 199S-N ACB 199S-P State Industries Brand SCB 110H-N SCB 110H-P SCB 110S-N SCB 110S-P SCB 150H-N SCB 150H-P SCB 150S-N SCB 150S-P SCB 199H-N SCB 199H-P SCB 199S-N SCB 199S-P [Learn More]

About 17, 370 (In addition, about 782 units were sold in Canada) units were affected by this recall.

Lochinvar, A.O. Smith and State Industries brand condensing residential boilers
Lochinvar Recalls Condensing Boilers Due to Risk of Carbon Monoxide Poisoning

Recalled Lochinvar condensing residential boiler. Recalled A.O. Smith condensing residential boiler

Lochinvar, A.O. Smith and State Industries brand condensing residential boilers Recall Information

Country of OriginUnited States
Recall Date11/02/2023
Recall ID9747
Recall Number24018
HazardThe boiler's flue collector can crack if exposed to a high impact event in the burner chamber, which can allow the boiler to emit carbon monoxide, posing a risk of carbon monoxide poisoning.
InjuriesLochinvar has received nine reports of broken flue collectors. Lochinvar has received no reports of injury.
RemedyConsumers with the recalled boilers should immediately contact the installer or a qualified technician to schedule a free repair. The repair will consist of installing a steel plate, which will be affixed to the base of the flue collector to act as a reinforcement. Consumers who continue use of the boilers while awaiting repair should have working carbon monoxide alarms outside of sleeping areas and on each floor of the home.
Remedy OptionRepair
ContactLochinvar toll-free at 833-232-9706 from 8 a.m. to 8 p.m. ET Monday through Friday or online at and click on "Recall Notices" at the bottom of the page. Consumers can also check for the recalled boilers' serial number at:, and select the look-up feature for the flue collector recall. Consumers with Lochinvar-branded boilers can find a qualified service technician by visiting: Consumers with A.O. Smith or State Industries-branded boilers should contact their installer. Consumers who do not know their installer can contact Lochinvar toll-free at 833-232-9706 or email the firm at [email protected].
Last Updated11/02/2023
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