January 12, 2026 – A consumer has reported significant mold growth within an internal, inaccessible component of a Ninja PB051ST ground and pod coffee maker, rendering the appliance unusable due to potential health risks. The incident highlights a critical design flaw where areas prone to moisture retention cannot be cleaned or sanitized, posing a concern for food preparation appliances.
Product Details
Incident Overview
The incident, reported on December 18, 2025, details a consumer’s discovery of mold growth within their Ninja PB051ST coffee maker. The mold was observed in an internal component within the water reservoir that is completely inaccessible for cleaning. The design features mesh-covered openings, preventing any attempt to reach or properly sanitize the affected area.
According to the report, the appliance was used as intended for normal coffee preparation, and the owner followed typical cleaning and maintenance routines. Despite these efforts, water retention in the unopenable internal component led to mold proliferation. Upon discovering the mold, the consumer immediately ceased using the coffee maker due to concerns about contamination and potential exposure to mold spores. While no confirmed injury has occurred, the presence of mold in a food-related appliance presents a significant potential health risk.
The consumer contacted SharkNinja Operating LLC for a resolution. Initially, they were informed that a replacement water reservoir would be shipped within 10 business days. However, after the promised timeframe elapsed, the consumer was notified that the required part was on backorder, with an estimated delay of 2 to 4 weeks, leaving the product unusable for an extended period. As of the report date, the manufacturer had not fully resolved the issue, and the coffee maker remains unusable.
Safety Concerns
The presence of mold in a coffee maker, particularly in components that come into contact with water and cannot be cleaned, poses several significant safety concerns:
- Immediate Health Risks: Mold can produce allergens, irritants, and potentially toxic substances (mycotoxins). Ingesting mold spores or inhaling them through steam generated during brewing can lead to allergic reactions, respiratory issues (such as coughing, wheezing, and difficulty breathing), headaches, and other adverse health effects, especially in individuals with asthma, allergies, or weakened immune systems.
- Contamination of Beverages: The primary concern is the direct contamination of coffee with mold spores and associated toxins. This compromises the safety and quality of the beverage intended for consumption.
- Product Unusability and Financial Loss: The inability to properly clean and sanitize the appliance makes it unsafe for its intended purpose, effectively rendering the product unusable. This represents a financial loss for the consumer who purchased a product that cannot be safely maintained or used long-term.
- Design Flaw: The incident points to a potential design flaw in the Ninja PB051ST where internal components are susceptible to mold growth due to water retention and lack of accessibility for cleaning. This could indicate a broader issue affecting multiple units of the same model.
What Consumers Should Do
If you own a Ninja PB051ST coffee maker or a similar appliance with inaccessible water reservoirs, here’s what you should do:
- Inspect Your Appliance: Carefully inspect your coffee maker, especially the water reservoir and any visible internal components, for any signs of mold growth, discoloration, or unusual odors. Use a flashlight if necessary to check hard-to-see areas.
- Stop Use Immediately: If you discover mold or suspect contamination in your coffee maker’s water system, cease using the product immediately to prevent potential health risks.
- Contact the Manufacturer: Reach out to SharkNinja Operating LLC to report the issue and inquire about potential solutions, replacements, or refunds. Document all communications, including dates, names of representatives, and any promised actions.
- Thorough Cleaning (if possible): For areas that are accessible, follow the manufacturer’s recommended cleaning procedures diligently. However, if mold is found in an inaccessible component, as in this incident, cleaning may not be possible.
- Report the Incident: File a detailed incident report with the U.S. Consumer Product Safety Commission (CPSC) at SaferProducts.gov. Your report helps identify patterns and potential widespread issues, leading to investigations or recalls.
Manufacturer’s Response
SharkNinja Operating LLC was contacted by the consumer regarding the mold issue. The manufacturer acknowledged the problem and initially offered a replacement water reservoir, with an estimated delivery within 10 business days. However, this commitment was not met, and the consumer was later informed that the part was on backorder, causing a further delay of 2 to 4 weeks. As of the time of the incident report, the issue remained unresolved, and the consumer’s product was still unusable.
Legal Help Available
If you or a loved one has been injured by a defective product or suffered property damage due to a product malfunction, you may be entitled to compensation. The experienced product liability attorneys at Farzan Law understand the complexities of defective product cases and can help you navigate the legal process.
Contact us today for a free consultation: 424-325-3112
Our legal team has successfully represented clients in product liability cases involving defective appliances, automotive defects, medical devices, and consumer products. We work on a contingency fee basis, which means you don’t pay unless we win your case.
Note: This information is based on incident reports provided by the U.S. Consumer Product Safety Commission. If you find information that is incorrect, please contact us immediately so we can correct the post to reflect accurate information.
Disclaimer: The information provided in this post is not intended to be legal or medical advice. This article is based on publicly available incident reports. The incidents mentioned have not necessarily been independently verified or adjudicated.