The answer to 'furnace repair vs' is that furnace repair is generally more cost-effective and convenient than replacing the entire furnace, especially for minor issues. Furnace repair involves diagnosing and fixing specific problems with the furnace, such as a malfunctioning thermostat, clogged air filters, or a faulty ignition system. This can often be done in a single visit by a qualified HVAC technician, and the cost is typically much lower than a full furnace replacement.
On the other hand, furnace replacement may be the better option if the furnace is old, inefficient, or has major issues that would require extensive repairs. A new, energy-efficient furnace can provide significant long-term savings on utility bills and may be worth the upfront investment, especially if the existing furnace is nearing the end of its lifespan.