Garage door opener emits a burning smell or visible smoke during or after operation.

Safety first: Immediately unplug the opener and do not attempt to operate it again until inspected. If smoke is heavy, evacuate the area and consider calling emergency services.

• Inspect for visible damage: After cooling, remove the opener cover and look for burned wires, melted insulation, or charred components.
• Check door and drive: Ensure the door moves freely by hand and the rail/trolley are not jammed. A jammed door can overheat the motor.
• Do not bypass safety devices: Do not bypass fuses, thermal protectors, or capacitors to "get it working"; this is a fire hazard.
• Replace damaged components: If the motor housing is discolored or wiring is burned, replace the motor assembly or entire opener head. Replace any leaking or swollen capacitors.
• Consider full replacement: For older Craftsman units with significant internal damage, replacing the entire opener may be more cost-effective and safer than repair.