When should I replace my furnace? Is there a particular age or specific performance issue that indicates it’s time to make this significant investment? As seasons change and temperatures fluctuate, how can one decipher the subtle cues that might suggest an impending furnace failure? Might unusual sounds, inefficient heating, or rising energy bills be the telltale signs of troubles brewing beneath the surface? Could the presence of lingering cold spots throughout your residence imply that your furnace is no longer capable of delivering optimal performance? Additionally, how do factors such as the age of the unit, frequency of repairs, and overall energy efficiency contribute to the decision-making process? Is it prudent to weigh the costs of continued repairs against the advantages of investing in a newer, more efficient model? Ultimately, what criteria should one consider to ensure comfort and safety within their home when evaluating the necessity of replacing their furnace?