Mainstays HU00-19054NB

SaferProducts.gov consumer incident report 20260118-A4BA3-2147324422. Severity: Injury, No First Aid or Medical Attention Received. Product: Mainstays HU00-19054NB (Mainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma, Black. This is a Walmart house brand.). Incident: Likely electrocution/fire/burn hazard. This is in reference to the item Mainstays Round Ultrasonic Cool Mist Top Fill Humidifier with Aroma, Black purchased from Walmart. Mainstays is their house brand. The humidifier has too weak of a spring on the check valve that allows the tank to refill the humidifier base. This results in the silicone valve seal not fully seating against the sealing surface. About 3-4 drops per second make it past the seal. Over the course of about 2 hours, this allows for the humidifier base to overfill and leak into the internal electronics portion of the base. Water shorted the internal nightlight and was running out of the base and down the power cord. Further, water was found inside the lower housing, a region that should not be exposed to water. Additionally the overfilled humidifier base heated the water to the point of burning ones hands when trying to pour out the water. This event occurred on the first use. This was not a one-off manufacturing defect. This seems systemic. Multiple units from this store exhibited the same leak due to the weak spring. Likely, an entire batch of these contain the inadequate spring. This will lead to burns, electrical hazards, and/or fires.