State the selected programme, type of load, actual result and any warning. Add when the change began and whether the machine is vented, condenser or heat pump if known.
Understanding this situation
These details distinguish a programme expectation from a new fault and help establish service scope. A claim that the heater must be broken skips information the engineer needs.
A useful next step
Use ordinary observations already available. Do not run unsafe tests or dismantle the machine for a better description. Mention burning, tripping, abnormal heat or a suspected foreign object immediately, and keep the appliance unused where appropriate.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.