A stack changes the lifting and access requirements for inspection or removal. The engineer may need appropriate equipment or assistance beyond a normal floor-level visit.
Understanding this situation
The stacking kit and surrounding space also matter. A dryer that can be reached from the front may still need safe access elsewhere for assessment, which should not be improvised on arrival.
A useful next step
Provide the models and a clear description of the arrangement. Clear loose obstacles without unstacking it yourself. Agree access planning before work rather than attempting a solo lift to make the visit easier.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.