A raised edge can prevent straightforward extraction of a tall fitted unit. That affects handling and access even if it has nothing to do with the cooling fault.
What the observation tells you
Pulling against it can damage flooring, furniture fixings or the appliance's cable. An apparently small height difference may require a planned method. Do not remove flooring or loosen the appliance in advance without agreement.
A useful next step
Describe the lip, available space and installation type to the booking team. Clear loose items while leaving structural access decisions to the attending professional.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.