The answer to 'furnace repair or furnace repair' is that furnace repair is typically the more cost-effective option compared to replacing your entire furnace. Furnace repair involves diagnosing and fixing specific issues with your existing furnace, such as a broken thermocouple, faulty ignitor, or clogged air filter. This can often be done for a few hundred dollars, depending on the problem. In contrast, replacing a furnace can cost $3,000 to $7,000 or more, depending on the size, efficiency, and features of the new unit.
However, there are some cases where furnace replacement may be the better choice, such as if your furnace is over 15-20 years old and becoming increasingly unreliable, or if it is extremely inefficient and costing you a lot in energy bills. A professional HVAC technician can assess your furnace's condition and recommend the best course of action for your specific situation and budget.