Yes. Access through walls, roofs or high external outlets may involve work beyond an ordinary appliance visit. The route and access should be described before booking.
Understanding this situation
A technician cannot safely reach every outlet merely because it serves a dryer. Building details and height can affect equipment and scope, while the appliance symptom still needs its own assessment.
A useful next step
Provide an accessible description without climbing or dismantling. Agree the appropriate service before work begins. Do not keep using a dryer with a suspected blocked outlet simply because the visible portion is difficult to reach.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.