Are Plug-In Carbon Monoxide Detectors Reliable? Why You Should Unplug the KH158 Today (2026)
The short answer
You plugged a little white alarm in by the stove so it would warn you. The federal safety agency says it may stay quiet.
If it is a KH158, unplug it today and put a working alarm up the same day. The CPSC says this plug-in gas and carbon monoxide detector "can fail to alert consumers." The company has not agreed to a recall.
A KH158 can come in a KH Alert box or a Sooguard box. It is one detector under 18 names. Look at the one on your wall today.
What this guide answers
What else in your kitchen needs a second look?
The free 3 minute scan goes room by room and tells you what to swap first. You give a first name and a cell, and your score comes by one text. It is free because I would rather you see your own house than take my word for it.
Take the free home scanWhat did the CPSC say about the KH158?
Quick answer: stop using it now. The agency counts 91 reports of these detectors staying quiet during a leak.
The furnace kicked on last month. Tonight the gas fireplace is going. That little white box by the stove is what you count on to speak up.
You stood at the counter longer than you meant to, waiting for its green light.
No shame in trusting it. It sold online for two years, under 18 names.
You wanted a warning before the air turned on you. That is a fair thing to want. The trouble, the CPSC says, is what the company sold you.
The US Consumer Product Safety Commission posted warning 26-706 on August 20, 2026. It says to "stop using and dispose of these products immediately."
The notice counts "91 reports of the detectors failing to alarm" during gas or carbon monoxide leaks.
The company is Shenzhen Kanghua Shengshi Industrial Co., LTD, which does business as KH Alert. The CPSC says it "has not agreed to recall these detectors."
And so the notice offers no refund. It covers 376,974 of them, sold for $13 to $140.
How do I know if mine is a KH158?
Quick answer: one of 18 names on the box. On the front, a SELF-TEST button with three small lights to its left.
The CPSC says the KH158 is white, gray or black plastic with a digital display. A button marked SELF-TEST sits on the front.
Three lights sit to its left: green for POWER, yellow for FAULT and red for ALARM.
Then match the name on yours to the 18 below.
Which 18 names are on the box?
| Names the CPSC lists for the KH158 |
|---|
| ARIKON, ELECOIN, FLUNGSKY, HAOKESITE, Hembisen, JNHCD |
| KAKIMENT, KH Alert, KOABBIT, NICGOL, NORJAN, OUMEBIU |
| Sooguard, Vilfet, Vzmcov, WESHLGD, XLA Alert, YOJOCK |
It sold on Amazon, eBay, AliExpress, microcenter.com and snapklik.com from June 2024 through July 2026.
If yours matches, unplug it today.
Then put a working alarm up the same day.
Are plug-in carbon monoxide detectors reliable at all?
Quick answer: not without a battery inside. The CPSC wants a battery or a battery backup "in case of a power outage."
A plug-in runs on the outlet. When an ice storm knocks the power out, one with no battery goes dark.
That can be the night you light the gas fireplace for heat.
A power outage is the reason the CPSC gives in its January 2025 winter notice. It also names "furnaces and fireplaces" as "a potential source of CO."
The EPA lists gas stoves as a source too. It warns of "flu-like symptoms that clear up after leaving home." That is feeling sick at home and better once you leave.
And your nose cannot warn you. The CDC calls carbon monoxide "an odorless, colorless gas that kills without warning." It says more than 400 Americans die from it by accident each year, not counting fires.
And so the battery is the whole point. An alarm that keeps going in a blackout is the one that can wake you.
Does any federal rule make a seller meet UL 2034?
The CPSC's warning says to "only buy carbon monoxide detectors that meet the UL 2034 safety standard."
But the CPSC files UL 2034 under voluntary standards. On that page, the line for rulemaking and regulations says "N/A." So no federal rule makes the seller meet it.
Here is the record. Start with the last column.
| What happened | The concern | Named authority and date | What it does NOT mean |
|---|---|---|---|
| Stop-use warning on 376,974 KH158s | The CPSC says they "can fail to alert consumers" | CPSC warning 26-706, August 20, 2026 | Not a recall, and the notice offers no refund |
| 91 reports to the CPSC | No alarm during a gas or carbon monoxide leak | CPSC, same warning | The notice lists no deaths or injuries |
| Alarms need a battery or battery backup | A plug-in alone goes dark in an outage | CPSC winter notice, January 22, 2025 | Some plug-ins have a backup |
Is there a case for keeping your plug-in?
Quick answer: two fair points, and neither one covers a KH158.
First, the notice counts 91 reports against 376,974 sold. It lists no deaths and no injuries. That is a small share.
But in April 2026, Consumer Reports said it found four people hospitalized, two of them children. They were in SaferProducts.gov reports on the Hembisen KH-158, one of the 18 names. Hembisen told Consumer Reports it disputes the reports.
Second, a plug-in with a battery backup keeps going in a blackout.
So why would I still tell you to unplug it today?
Because you would never know it stayed quiet. Your nose gets nothing to go on. Not one more night.
You are far from the only one who trusted it. If your mother or your neighbor bought one too, check hers the same day.
What goes on the wall instead?
Quick answer: a plain alarm with a battery inside. Put one on every level and outside the bedrooms.
Unplug the KH158 today. Then put up an alarm that runs on a battery or has a battery backup.
The CPSC says to place alarms "on every level of the home and outside sleeping areas." Linked alarms are best, it says, because "when one sounds, they all sound."
Press the test button every month. Once a year, have a pro check the furnace, the fireplace and the water heater. The CPSC asks for both.
That takes care of the alarm. For the cleaners and soaps you use every day, I point you to Switch to America. It is a private membership store. We are the manufacturer. No middlemen, no markup.
Before bed tonight, press the test button on the new one.
Shannon's Advice
Straight talk from ShannonI do not call them grocery stores. They are poison centers meant to do you and your family harm. It is not just the brands who are doing the harm, it is the stores themselves. They allow these toxic products on their shelves. People are sick and dying. This is a very serious matter. How can we ever trust them again?
We can't trust them. That is where Switch to America comes in. We are a new supply chain, built on family values, trust and affordability.
You do not have to take my word for it. The proof is in my blog posts, the recalls, the lawsuits and the fines, and in the app I built called The Family Home Toxic Scorecard. Also, inside my Switch Circle private community, we talk about real solutions.
Women come to me exhausted, in pain, stressed out, and on a list of prescriptions they never wanted. I have spent over 20 years helping women get off prescription medications. I help families reclaim their health.
We cannot stop them. I have stopped expecting to. However, we can stop walking into their stores. We are linking arms and together taking our control back. Control of our health and our finances.
Start by clicking the link below and taking the SCAN.
The receipts
- US Consumer Product Safety Commission, warning 26-706, August 20, 2026. Tells you to stop using the KH158, 376,974 sold under 18 names. It cites 91 reports of them failing to alarm during leaks. What it means: take it down, and the notice offers no refund.
- US Consumer Product Safety Commission, winter safety notice, January 22, 2025. Says alarms should be battery operated or have battery backup in case of a power outage. What it means: a plug-in with no battery can go dark the night you need it.
- US Consumer Product Safety Commission, voluntary standards page for carbon monoxide alarms. Lists UL 2034 as voluntary, with "N/A" on the line for rulemaking and regulations. What it means: no federal rule makes the seller meet it.
- CDC, Carbon Monoxide Poisoning Basics, January 12, 2026. Calls carbon monoxide odorless and colorless. Counts more than 400 accidental American deaths a year not linked to fires. What it means: your nose cannot back up a quiet alarm.
- US EPA, Carbon Monoxide's Impact on Indoor Air Quality. Lists gas stoves, furnaces and fireplaces among the sources. What it means: your own gas range is on that list.
Who do you become?
You become the one who looked twice at the little white box on the wall.
It is a cold night in January. The furnace hums, and the soup is on the stove.
The backsplash is just tile now, and the alarm sits up on the ceiling. You stir the pot and never once glance at the wall.
It took one unplugged detector to start.
Three minutes, room by room
The detector was one thing on one wall. The free scan does not test your air. It checks the products in every room and tells you what to swap first. A first name and a cell, one text with your score, and nobody calls.
Take the free home scanWhat else do people ask?
Are plug-in carbon monoxide detectors any good?
Not a KH158, not one more night. Any other plug-in needs a battery backup, the CPSC says, in case of a power outage. If yours has none, add a battery alarm on that floor.
My detector came from Amazon. Is it on the warning?
Match the brand on your box or your order to the 18 names above. Then look for a SELF-TEST button with green, yellow and red lights to its left.
Can I get my money back?
The notice offers no refund, because the company has not agreed to a recall. If you bought it on Amazon, Consumer Reports says to return it and ask for a refund. Stop using it either way. The CPSC takes defect reports at SaferProducts.gov.
It has been plugged in for two years and never went off. Why change now?
Never going off is also what a quiet alarm looks like. The CDC says carbon monoxide "kills without warning." You get to be the one who checked.