Ask the booking team what preparation is appropriate. Unnecessary disconnection can introduce leakage or electrical risks and may remove useful information about the original installation.
Understanding this situation
A plug, isolation switch or water valve may be difficult to reach, and integrated appliances can have hidden restraints. Making the machine accessible should not involve stretching behind it, pulling on hoses or moving heavy equipment without suitable help.
A useful next step
Keep the machine unused if it has a safety concern and isolate only where this can be done safely. Clear nearby loose items and provide access details. Leave dismantling and connection work to the agreed competent person.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.