An electrical heater near melting water creates risk and can damage the appliance. Follow the manufacturer's permitted defrost method instead of directing hot air at the liner.
What the observation tells you
Local heating can affect plastic and concealed components differently from natural thawing. A faster-looking result does not show that the material remained undamaged. Extension leads and wet floors make the arrangement more hazardous.
A useful next step
Move food to suitable storage and allow the documented process to work. Use only aids expressly allowed for the exact model. Never treat a household hairdryer, heat gun or steam cleaner as a universal freezer-care tool.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.