Follow the manufacturer's shutdown arrangement and secure the appliance against children and unwanted access. Ventilation alone is not the only concern when a lid or door is left ajar.
What the observation tells you
A vacant garage or outbuilding may also have pests or dust. Improvised coverings can trap moisture or obstruct a lid. Do not leave an appliance in a condition that someone could climb inside or become trapped.
A useful next step
Use an appropriate secure storage or disposal plan and follow collection instructions if it is being removed. Clean and dry it first, and obtain help where the safe arrangement is unclear.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.