The answer to 'why is my furnace repair' is that there are several common causes for furnace issues that may require repair, including a malfunctioning thermostat, clogged air filters, pilot light problems, and issues with the furnace motor or blower. Symptoms can include the furnace not turning on, short cycling, strange noises, and poor airflow or heating.
For minor problems like a dirty air filter or thermostat issues, homeowners may be able to perform basic troubleshooting and repairs themselves. However, for more complex problems with the furnace components or if you're unsure of the cause, it's best to call in a professional HVAC technician to diagnose and repair the issue properly and safely.