Which factor is not typically a reason to replace a gas furnace?

Replacing a gas furnace is generally considered when certain factors indicate that it is no longer performing efficiently or effectively. One key factor that does not warrant a replacement is consistent heating performance. If a furnace consistently provides reliable and adequate heating, it demonstrates that the system is functioning properly and meeting the home's heating needs.

On the other hand, age, low Annual Fuel Utilization Efficiency (AFUE) ratings, and frequent minor repairs are all indicative of potential issues that might justify considering a replacement. An older furnace, especially one over 15 years old, may not be as efficient or reliable as newer models. A low AFUE rating suggests that the furnace is not converting fuel to heat as efficiently as possible, leading to higher energy costs. Moreover, frequent minor repairs can signal that major components are failing or that the furnace is nearing the end of its useful life, making replacement a more cost-effective and reliable solution in the long term.