Yes, furnace tune-ups are worth it. Regular maintenance can prevent breakdowns, extend the furnace's lifespan, and ensure it operates efficiently, saving on energy costs. Tuning up the furnace also enhances safety by addressing potential issues like gas leaks. Additionally, manufacturers often require regular maintenance to maintain warranty validity. The relatively low cost of a tune-up compared to potential repair expenses or premature replacement makes it a wise investment in the overall performance and longevity of your heating system.