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The Lennox 60M97 (60M9701) is a genuine OEM high-limit switch designed to protect your Lennox furnace by shutting off the burner when internal temperatures exceed safe operating levels. A faulty limit switch can cause symptoms such as the furnace shutting off prematurely, failing to ignite, or running the blower continuously without producing heat. This OEM-certified replacement ensures precise fit and reliable performance in compatible Lennox heating systems.