Ask the booking team what preparation is appropriate. Unnecessary disconnection can create leakage, electrical risks or loss of useful information about the original arrangement.
Understanding this situation
A fitted appliance may have hidden restraints and limited access. Reaching behind it or pulling on hoses to make room is not a routine customer requirement.
A useful next step
Keep the machine unused if unsafe and isolate only where access is safe. Clear nearby loose items and explain restrictions. Leave disconnection or removal to the agreed competent person rather than improvising it before assessment.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.