The answer to 'which is better furnace repair or' is that furnace repair is generally better than replacement, unless your furnace is extremely old or inefficient. Furnace repair is typically more cost-effective and can extend the life of your existing system, while replacement is a larger investment.
Furnace repair involves fixing specific issues like a malfunctioning thermostat, worn-out parts, or airflow problems. This can be done by a qualified HVAC technician and is usually faster and less disruptive than a full replacement. Replacement, on the other hand, involves installing a brand new furnace system, which can be more expensive upfront but may provide better energy efficiency and performance in the long run.