SaferProducts incident

Failure type

Fire / ignition

Incident narrative

SaferProducts.gov consumer incident report 20260410-C1616-2147320740. Severity: Incident, No Injury. Product: Cosmo COS-12MWDSS-NH (24-inch built-in microwave drawer, stainless steel color, 1.2 cubic foot capacity, 1000 watts output, 120V 60Hz. Exterior dimensions 23.8 inches wide, 24.5 inches deep, 15 inches high. Manufactured February 2024. The unit is designed to be permanently installed inside kitchen cabinetry as a drawer-style microwave. Purchased from Home Depot approximately 1.5 years ago.). Incident: I own a Cosmo COS-12MWDSS-NH 24-inch built-in microwave drawer, purchased from Home Depot approximately 1.5 years ago. During normal use - heating water in microwave-safe clear glass - the unit began producing visible electrical arcing and loud zapping sounds inside the cooking cavity. I immediately stopped the microwave. This occurred on multiple occasions. The most recent incident was severe enough to leave a permanent black scorch mark on the interior cavity wall. The carbon residue from the scorch mark is conductive, causing repeated arcing to the same spot and worsening the damage with each use. This presents a fire hazard. I contacted Cosmo and was told the 1-year warranty had expired. No replacement parts are available. I am also aware of at least one other consumer review describing a fire occurring behind this same model. No injuries occurred, but continued use poses a serious fire risk, particularly as this is a built-in appliance installed inside kitchen cabinetry.