Mainstays HF3190W-UL

SaferProducts.gov consumer incident report 20251114-93CF1-2147326343. Severity: Incident, No Injury. Product: Mainstays HF3190W-UL (Mainstays humidifier (Model HF3190W-UL) White). Incident: On Friday, November 14th 2025, a White Mainstays humidifier (Model HF3190W-UL) caught fire in our home. At approximately 2:05 PM, my husband returned home and immediately smelled smoke in the house. Seconds later, the upstairs fire alarms activated. The smoke was coming from the humidifier located in our upstairs bedroom. The device was actively burning from inside the unit. The plastic housing had melted open and flames were visible. My husband attempted to extinguish the fire using a fire extinguisher, which helped some but the flames continued. He then carried the burning humidifier with his bare hands into our hallway bathroom and placed it in the bathtub, where he doused it with water until the fire was fully out. While he was working on the fire, I called 911 at 2:07 PM, and the fire department arrived within minutes to clear the home and ensure the fire was completely out. The fire caused damage to the carpet, subfloor, hallway flooring, and a wooden bench. There is smoke odor throughout the second floor and faintly through the rest of the home. My husband inhaled smoke while suppressing the fire. The humidifier bears an ETL certification mark, and it appears that the ignition originated internally. The top is completely melted, internal components are charred, and the wiring is visibly burned. The unit was purchased approximately two to three years ago. We still have the burned device and can provide photos or the physical unit if needed. This incident created a significant fire hazard, physical risk, and property damage.