When’s the best time to replace my furnace?

Are there benefits to replacing my furnace in autumn? how often should I change my furnace? is fall a good time to replace my furnace? Is fall the best time to replace my furnace? Is it better to replace my furnace in the fall? should I replace my furnace before winter? Should I wait until winter to replace my furnace? What's the best season for furnace replacement? what's the ideal time to get a new furnace? What's the right time to get a new furnace? when do most people replace their furnace? when should I replace my furnace? When should I replace my furnace? when's it too late to replace a furnace? When's the optimal time for furnace replacement? when's the right time to upgrade my furnace?