A washing machine should have the electrical supply arrangement specified by its manufacturer. High-load appliances can overload unsuitable extension arrangements, particularly when shared with other appliances.
Understanding this situation
A socket that is difficult to reach is an access problem, not a reason to improvise with stacked adaptors. Heat, discoloration or a damaged plug or lead needs attention, and a different extension does not diagnose the underlying issue.
A useful next step
Stop using a hot or damaged connection and obtain appropriate electrical advice. Explain the existing supply arrangement when booking an appliance enquiry. Do not open sockets, alter fuses or uprate protection to keep the machine operating.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.