What should I do if a spare part I ordered doesn't perform as expected?

Have the part inspected against the manufacturer's specification to confirm whether it was genuinely mismatched or whether an installation or unrelated issue is the actual cause of the poor performance. If the part itself is confirmed as the problem, it's worth reviewing your sourcing approach for that component going forward, particularly if it was sourced from an unfamiliar supplier. Documenting this kind of issue also helps build a better sourcing record for future orders. Sparkline Group can inspect underperforming parts and recommend verified alternatives where a mismatch is identified.