The symptom alone may not identify the required work. Fault, parts compatibility, access and previous repairs can affect what an appropriate repair involves.
Understanding this situation
A puddle, warning or poor result can have more than one explanation. Purchasing a suspected component before confirmation can add cost without resolving the actual problem.
A useful next step
Start with the full model, symptoms and any existing report. Clarify the quoted work and fitting arrangements before ordering parts. Do not assume that a generic online price or a similar-looking component establishes the total for your appliance.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.