Symptom-led browsing is useful when the model shows no code or the failure is intermittent. Choose the closest observed behavior, then compare the full sequence.
Qualifiers make a symptom useful: which compartment, burner or cycle stage is affected; whether the failure is constant or intermittent; whether it changes under load; and whether it began after cleaning, moving, installation or repair.
The same symptom can have a different cause. The best comparison shares both the appliance context and the sequence of observations, not merely one phrase such as “not heating.”
If a display code is present, continue to the error-code index. If the behavior is strongly model-specific, use the brand and model index. Keep prior repairs and measured values in the comparison.