Hearth Record

CPSC Warns Consumers to Immediately Stop Using PETRICOR, VARWANEO, and WJZTEK Combination Smoke and Carbon Monoxide Detectors Due to Failure to Alert Consumers to Deadly Smoke; Sold on Amazon.com

CPSC warning 23-179. Announced by CPSC on Apr 13, 2023.

  • CPSC warning, not a recall
  • CPSC: stop using it
CPSC’s own warning, on cpsc.gov

Watch and the shortlist are kept with a free account, on every device. Your watch list. CPSC’s own warning is on cpsc.gov.

The short answer

Announced by CPSC on Apr 13, 2023. Copied from CPSC on Oct 25, 2026.

Every line below is in CPSC’s own words, with its source beside it.

What’s wrong with it?

CPSC issued this as a product safety warning, not a recall.

CPSC warns people about a product this way when there is no recall of it. What’s wrong and what to do are below, in CPSC’s words.

Source:

CPSC, Product safety warnings. Released Oct 19, 2026. Updated daily.

Hearth Record wrote these lines.

If a combination smoke and CO detector that does not alert to the presence of an elevated level of carbon monoxide or smoke is installed in a home, and carbon monoxide or smoke enters the home, the consumer will not be warned of these harmful conditions, making injury or death very likely. Smoke sensitivity tests performed on the PETRICOR, VARWANEO, and WJZTEK detectors by CPSC found that they failed to alert when exposed to pre-determined concentrations of smoke, in violation of UL 217, a voluntary safety standard.

Source:

CPSC, Product safety warnings. Released Oct 19, 2026. Updated daily.

What should you do?

CPSC urges consumers not to purchase or sell these combination smoke and CO detectors. Stop using them and dispose of these products immediately and install new, working CO detectors.

Source:

CPSC, Product safety warnings. Released Oct 19, 2026. Updated daily.

Which ones does it cover?

Washington, D.C. -- The U.S. Consumer Product Safety Commission (CPSC) is warning consumers about the risk of smoke inhalation associated with the use of PETRICOR, VARWANEO, and WJZTEK combination smoke and carbon monoxide (CO) detectors. The detectors can fail to alert consumers to the presence of hazardous smoke.Most fatalities in residential fires are due to smoke inhalation, rather than heat and flames. In typical residential fire scenarios, there may be as little as one or two minutes to escape after the smoke alarm sounds before the conditions in the home become incapacitating or deadly. More than 2,390 people in the United States die every year from residential structure fires. Furthermore, the risk of dying in a fire is twice as high in homes without a working smoke alarm (1.18 per 1,000), as compared to homes with smoke alarms (0.53 per 1,000).”If a combination smoke and CO detector that does not alert to the presence of an elevated level of carbon monoxide or smoke is installed in a home, and carbon monoxide or smoke enters the home, the consumer will not be warned of these harmful conditions, making injury or death very likely. Smoke sensitivity tests performed on the PETRICOR, VARWANEO, and WJZTEK detectors by CPSC found that they failed to alert when exposed to pre-determined concentrations of smoke, in violation of UL 217, a voluntary safety standard.The combination detectors are made of white plastic, with approximate dimensions of 4 x 1.5 x 4 inches. The PETRICOR and VARWANEO models feature a digital display. The PETRICOR and WJZTEK models feature a label on the back which lists the model number. The combination detectors are advertised to detect dangerous levels of smoke or carbon monoxide and alert with a flashing red LED and a loud alarm pattern. Model No. MQ-808 was sold under the Amazon ASIN B09DPPFJZJ; and Model No. ACJ-512COM was sold under the Amazon ASIN B0928QZ21C; and Model No. KT-X3 was sold under the Amazon ASIN B07QVC2722 and B07M8LR9M7. The combination smoke and CO detectors were sold on Amazon.com for between $15 and $53. CPSC urges consumers not to purchase or sell these combination smoke and CO detectors. Stop using them and dispose of these products immediately and install new, working CO detectors. Report a dangerous product or a product-related injury on www.SaferProducts.gov.Note: Consumers should install combination smoke and CO detectors on each level of their homes and outside separate sleeping areas. Combination smoke and CO detectors should be battery operated or have battery backup. Test combination smoke and CO detectors frequently and replace batteries as needed. Consumers should only buy combination smoke and CO detectors that meet both the UL 2034 and UL 217 safety standards.Individual Commissioners may have statements related to this topic. Please visit www.cpsc.gov/commissioners to search for statements related to this or other topics.

PETRICOR, VARWANEO, and WJZTEK Combination Smoke and Carbon Monoxide (CO) Detectors.

Source:

CPSC, Product safety warnings. Released Oct 19, 2026. Updated daily.

Who made and sold it?

  • The notice names no firm.
  • The combination smoke and CO detectors were sold on Amazon.com for between $15 and $53.
Source:

CPSC, Product safety warnings. Released Oct 19, 2026. Updated daily.

Was anyone hurt?

The notice doesn’t say whether anyone was hurt.

Source:

CPSC, Product safety warnings. Released Oct 19, 2026. Updated daily.

What the record doesn’t say

  • The notice lists no UPCs, so check the model, the description and the photos.
  • The notice lists no model numbers in a field of their own; its description may give them.
  • How many have been returned or fixed isn’t in the notice.
Source:

Hearth Record wrote these lines.

Sources

  • U.S. Consumer Product Safety Commission, Product safety warnings.

    Released Oct 19, 2026 and checked Oct 25, 2026. Updated daily. Public domain (U.S. Government work). CPSC asks to be credited, and that no endorsement be implied.

Source:

Recalls of kids’ and home products are from the U.S. Consumer Product Safety Commission (CPSC). CPSC does not endorse Hearth Record. Copied on Oct 25, 2026.

How to read a record

Four things every record does, shown on an example record made up for this guide.

An example record, made up for this guide

An example nursing home

Made up for this guide: no real place is shown

Not fully inspected in over two years (CMS flag)

11 health citations at the latest inspection cycle

The state average is 14.3.

Source:

CMS, State and US Averages and Health Deficiencies. Released Oct 8, 2026. Updated monthly.

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