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The Lennox Y3531 is a genuine OEM replacement motor kit, corresponding to Lennox part number 102617-01, designed specifically for Lennox 700A and 700M series units. This motor kit restores proper airflow and system efficiency when the original motor has failed due to bearing wear, overheating, or electrical failure. Common symptoms of a failing motor include reduced airflow, unusual noises, the unit failing to start, or the motor running hot — all of which this direct OEM replacement is designed to resolve.