Some exterior areas can become warm during normal heat rejection or condensation control. The model instructions help identify expected behaviour; touch alone does not diagnose overheating.
What the observation tells you
New extreme heat, burning smells, discolouration or electrical damage are different concerns and should not be dismissed. Avoid covering warm surfaces with insulation or pushing the appliance against furniture. Those actions can obstruct the intended heat path.
A useful next step
Keep specified ventilation clear and record which area is affected and when. If there are signs of overheating, stop using the appliance safely and obtain help rather than continuing a touch-based test.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.