Crown Boiler Recalls Home Heating Boilers Due to Carbon Monoxide Poisoning Hazard

What was recalled

In early March 2024, the U.S. Consumer Product Safety Commission (CPSC) issued a critical safety notice regarding specific home heating equipment manufactured by Crown Boiler. This recall targets a significant number of gas-fired hot water boilers, specifically those belonging to the Aruba IV series. It is important to clarify a common point of confusion right away: while the product line is widely known as the "Aruba IV," you will not find the words "Aruba IV" printed on the official rating plate or label attached to the unit itself. Instead, identification relies entirely on the specific model numbers listed on that label.

The primary concern driving this recall is strictly tied to altitude. The defective units are those configured for installation and operation at elevations above 2,000 feet. These boilers are designed to run on either natural gas or liquid propane (LP) gas. If you live in a high-altitude region—such as parts of the Rocky Mountains, the Great Plains, or other elevated areas—you are much more likely to have one of these specific models in your basement or utility room than someone living at sea level.

The physical description of the recalled boilers is quite distinct, which can help you narrow down your search. The units are characterized by a red and gray color scheme and stand approximately 39.5 inches tall. On the upper front-center of the unit, you will see the "Crown" logo. However, the definitive proof of whether your boiler is part of this recall lies in the model number located on a large white label affixed to the red metal side of the boiler. This rating plate is typically found on the top right side of the unit.

The list of affected model numbers is extensive and includes various configurations based on BTU output and gas type. The recall covers models such as AWR070BLST3P8U, AWR105BLST3P8U, AWR140BLST3P8U, AWR175BLT3HU1, and their counterparts in the BLT, BNST, BNT, ELST, ENST series (including sizes up to 280). Crucially, this recall applies regardless of the date these boilers were manufactured. If your unit matches any of the listed model numbers and is installed above 2,000 feet, it is subject to this mandatory safety modification.

While the CPSC announcement does not specify the exact total number of units sold or the specific retail stores where they were purchased, these boilers are generally distributed through professional HVAC channels for residential heating systems. If you are unsure when your boiler was installed or purchased, do not guess; simply check the model number on the white label against the list provided by Crown Boiler. The recall was officially announced on March 21, 2024, but the issue dates back to the manufacturing specifications of these high-altitude configurations.

The hazard, explained

To understand why this recall is necessary, it helps to look at the specific mechanical failure involved. The Crown Boiler Aruba IV units affected by this notice are designed to operate in high-altitude environments, specifically those above 2,000 feet. At these elevations, the air is thinner, which changes how gas-fired equipment burns fuel and vents exhaust. These boilers rely on a critical safety component called the Blocked Vent Switch (BVS). This device acts as a guardian, monitoring the flow of exhaust gases out of your home. Its job is simple but vital: if the vent system becomes blocked or fails to expel fumes properly, the BVS is supposed to immediately shut down the burners to prevent dangerous gas buildup.

The problem identified by the CPSC is that this safety switch can fail in these specific high-altitude installations. When the BVS malfunctions, it loses its ability to detect a blockage in the venting system. Consequently, the boiler continues to operate and burn fuel even though the exhaust path is compromised. Instead of safely exiting through the chimney or vent pipe, the combustion byproducts are forced back into the living space. The primary dangerous byproduct here is carbon monoxide (CO), a colorless, odorless, and tasteless gas that is produced whenever fuel is burned.

Carbon monoxide is particularly insidious because human senses cannot detect it. You cannot see it, smell it, or taste it in the air. When a boiler emits excessive amounts of CO due to this mechanical failure, the gas accumulates in your home’s atmosphere. As you breathe in this contaminated air, carbon monoxide binds to your red blood cells much more effectively than oxygen does. This prevents your body from delivering oxygen to your brain, heart, and other vital organs. In a domestic setting, this can lead to carbon monoxide poisoning, which ranges from mild symptoms like headaches, dizziness, and nausea to severe outcomes such as unconsciousness and death, depending on the concentration of the gas and the duration of exposure.

It is important to note that while this specific recall involves Crown Boilers at high altitudes, the underlying mechanism of carbon monoxide poisoning is a universal risk with any improperly vented fuel-burning appliance. The CPSC has reported no incidents or injuries related to this specific batch yet, but the potential for harm is real and immediate if the defect remains unaddressed. The failure of the BVS creates a scenario where the boiler effectively becomes a source of invisible poison within your home, rather than a source of heat. This is why immediate repair is not just a maintenance issue, but a critical life-safety intervention.

Who is most at risk

Understanding who faces the greatest threat from this recall requires looking at two distinct layers: first, who physically possesses the specific equipment involved, and second, which human bodies are most vulnerable to the invisible hazard these boilers can create. The primary group at risk here is not defined by age or health status alone, but by geography and home infrastructure. This recall specifically targets Crown Boiler Aruba IV gas-fired hot water boilers that have been installed in homes located at altitudes above 2,000 feet. If you live in high-elevation communities—such as parts of the Rocky Mountains, the Colorado Front Range, the Wasatch Front in Utah, or other elevated regions across the western United States—you are in the potential impact zone for this defect. The danger arises because the blocked vent switch (BVS) on these specific models may fail to shut down the burners if the vent system becomes obstructed. In these high-altitude environments, where air density is lower and combustion dynamics differ, a blocked vent can lead to the excessive emission of carbon monoxide into your living space.

Once we identify that you have one of the affected models in a high-altitude home, the question shifts to who within that household is most physiologically susceptible to carbon monoxide (CO) poisoning. Carbon monoxide is often called the "silent killer" because it is odorless, colorless, and tasteless, meaning victims may not realize they are being poisoned until symptoms become severe. The individuals most at risk from this invisible gas are typically those with developing or compromised respiratory systems. Children are particularly vulnerable because their breathing rates are faster than adults', allowing them to inhale larger quantities of the gas relative to their body size. Furthermore, a child’s blood-brain barrier is not fully developed, making their neurological tissues more sensitive to the oxygen deprivation caused by CO binding to hemoglobin.

Elderly individuals and those with pre-existing cardiovascular or respiratory conditions also face heightened risks. For seniors, whose bodies may already struggle with efficient oxygen transport, even low levels of carbon monoxide can exacerbate heart conditions, cause dizziness, or lead to confusion that might be mistaken for other age-related issues. People with anemia, chronic lung disease, or heart failure are in a precarious position because their blood’s ability to carry oxygen is already compromised; adding carbon monoxide to the mix can quickly push their bodies into a state of critical hypoxia. Pregnant women are also at significant risk, as carbon monoxide crosses the placental barrier, potentially affecting fetal development and causing complications for both mother and child.

It is crucial to note that while no incidents have been reported in the official recall data as of March 21, 2024, the potential for harm is real and immediate if the defect manifests. The risk is not limited to those who feel symptoms immediately; prolonged exposure to lower levels of carbon monoxide can cause headaches, nausea, and fatigue, which are easily dismissed as everyday ailments. Therefore, anyone living in a high-altitude home with an Aruba IV boiler must consider themselves at potential risk until the free repair is completed. The presence of working carbon monoxide alarms outside sleeping areas and on each floor of the home is not just a recommendation but a critical safety net for all occupants, regardless of their age or health status, while awaiting the remediation from Crown Boiler.

How to tell if you have the recalled item

Identifying whether your home heating system is part of this specific recall requires a careful look at both the physical characteristics of the unit and the precise data on its label. Because the manufacturer’s logo may be misleading, we need to focus entirely on the technical details stamped directly onto the boiler itself. First, observe the overall appearance of the unit. The recalled Crown Boiler Aruba IV models are distinctively colored in red and gray, with a total height of approximately 39.5 inches. While you might see a "Crown" logo on the upper front-center of the unit, please note that the name "Aruba IV" will not appear on this label, so do not rely on that text for identification.

The most critical step is locating the rating plate to verify the model number. This plate is situated on the top of the right side of the boiler. Look closely at this area for a large white label attached to the red metal side of the unit. The word "Crown" will be printed on the side, but you must read the specific alphanumeric code listed on that white label to determine if your unit is included in this recall. This recall only affects boilers configured for use at altitudes above 2,000 feet, so checking this configuration is essential.

If your boiler matches the physical description and is located in a high-altitude area, compare the model number on your white label against the following list of affected models. These specific model numbers are included in the recall regardless of when they were manufactured:

• AWR070BLST3P8U
• AWR105BLST3P8U
• AWR140BLST3P8U
• AWR175BLT3HU1
• AWR070BLT3HU1
• AWR105BLT3HU1
• AWR140BLT3HU1
• AWR175BNST3P8U
• AWR070BNST3P8U
• AWR105BNST3P8U
• AWR140BNST3P8U
• AWR175BNT3HU1
• AWR070BNT3HU1
• AWR105BNT3HU1
• AWR140BNT3HU1
• AWR175ELST2P8U
• AWR070ELST2P8U
• AWR105ELST2P8U
• AWR140ELST2P8U
• AWR175ENST2P8U
• AWR070ENST2P8U
• AWR105ENST2P8U
• AWR140ENST2P8U
• AWR210BNST3P8U
• AWR245BLST3P8U
• AWR280BNST3P8U
• AWR210BNT3HU1
• AWR245BLT3HU1
• AWR280BNT3HU1
• AWR210ELST2P8U
• AWR245BNST3P8U
• AWR280ELST2P8U
• AWR210ENST2P8U

If your model number matches any of the codes above, you have a recalled gas-fired hot water boiler powered by natural gas or LP (propane) gas. Do not attempt to diagnose the internal components yourself; simply take note of the model number and proceed to contact the manufacturer for your free repair.

What to do — step by step

Your refund, repair, or replacement options

If you own one of the affected Crown Boiler Aruba IV units, it is important to know that you do not need to purchase a completely new heating system or accept a refund that leaves your home without heat. The manufacturer, Crown Boiler, has established a specific and comprehensive remedy designed to resolve the safety issue while keeping your existing unit operational. This approach focuses on correcting the mechanical fault rather than replacing the entire appliance, which is generally more cost-effective and less disruptive for homeowners.

The core of the remedy is a free repair service. Crown Boiler has committed to providing this repair at no charge to consumers who contact them regarding the recall. The repair process involves two key components: a replacement main burner gas orifice and, if necessary, a replacement blocked vent switch (BVS). The BVS is the critical safety component in question; it is designed to shut down the burners if the vent system becomes blocked. However, in boilers installed at altitudes above 2,000 feet, this switch can fail to perform its duty, allowing carbon monoxide to leak into the home. By installing a new orifice and a verified functional BVS, Crown Boiler ensures that the boiler’s safety mechanisms are restored to their intended standard.

To initiate this process, you must reach out to Crown Boiler directly. They have set up dedicated channels for consumers to request this free repair service. You can call their toll-free number at 888-583-5624. Their customer service team is available from 8 a.m. to 5 p.m. Eastern Time, Monday through Friday. If you prefer written communication, you may also send an email to AKP@velocityboilerworks.com. Alternatively, you can visit their website at www.velocityboilerworks.com and navigate to the "Product Recall Alerts Important Information" section on the home page for further guidance. Another direct link to the recall details is available at www.velocityboilerworks.com/news/2024/01/product-modification-required-crown-aruba-iv-models-above-2000-ft-recall/.

It is crucial to understand that this remedy is not automatic. You must proactively contact the company to schedule the repair. Once you are in contact with them, they will guide you through the steps required to have the necessary parts installed. While the recall facts do not specify whether Crown Boiler technicians will come to your home or if you must take the unit to a service center, the provision of "free" parts and repair implies that the financial burden is entirely on the manufacturer. Do not pay for any part of this specific recall-related repair; it should be covered completely by Crown Boiler.

Additionally, while you wait for your appointment or for the repair to be completed, the remedy includes a critical safety instruction: ensure you have working carbon monoxide alarms installed outside of sleeping areas and on each floor of your home. This is not part of the physical repair but is an essential interim safety measure provided as part of the overall remedy package. For more information on preventing carbon monoxide poisoning, the CPSC recommends reviewing their guide at Protect Your Family from Carbon Monoxide Poisoning | CPSC.gov.

What can happen if you ignore it

Ignoring this recall is not merely a matter of voiding a warranty or delaying a convenience; it is an invitation to introduce a silent, invisible threat into the very air you breathe inside your home. The core issue with these Crown Boiler Aruba IV models lies in the blocked vent switch (BVS). Under normal circumstances, this safety component ensures that combustion gases are properly expelled outside. However, when installed at altitudes above 2,000 feet, the atmospheric pressure changes can interfere with the switch’s ability to function correctly if the vent system encounters even a minor blockage.

If you continue to operate the boiler without the mandatory repair, the burner may fail to shut down as intended. When this happens, the combustion process continues unchecked, and instead of safely exiting through the chimney or flue, excessive amounts of carbon monoxide (CO) are pumped directly into your living space. Carbon monoxide is particularly dangerous because it is odorless, colorless, and tasteless. You cannot smell it, see it, or detect it with your senses until it is too late. This means that a household could be exposed to lethal levels of the gas without any immediate warning signs from the equipment itself.

The consequences of prolonged exposure to carbon monoxide range from mild flu-like symptoms—such as headaches, dizziness, and nausea—to severe neurological damage and death. Because the symptoms often mimic common illnesses like the flu or food poisoning, victims may not realize they are being poisoned until significant harm has occurred. Vulnerable members of your household, including young children, the elderly, and those with pre-existing heart or respiratory conditions, are at the highest risk for rapid deterioration. In high concentrations, carbon monoxide can cause loss of consciousness and fatal asphyxiation in a very short period.

It is important to note that while no incidents have been reported to the CPSC regarding this specific recall as of the announcement date, the potential for tragedy is real and immediate. The hazard exists the moment the boiler is turned on and the vent system becomes compromised. By waiting for a scheduled maintenance appointment months from now, you are essentially gambling with your family’s safety every single time the heating system activates. The free repair provided by Crown Boiler addresses the root cause of this failure, but that protection only takes effect once the part is installed. Until then, the risk remains active and unmitigated.

Therefore, treating this recall with urgency is the only logical choice. The inconvenience of arranging a technician visit is negligible compared to the irreversible consequences of carbon monoxide poisoning. Do not wait for symptoms to appear in yourself or your family members as a signal that action is needed. The danger is present even when you feel perfectly fine. By ignoring the recall, you are allowing a known mechanical failure to persist in an enclosed environment where people sleep, eat, and spend their most vulnerable hours.

Staying safe: broader tips