Many Furnace Repair Louisville repair calls come down to ignition problems, worn flame sensors, faulty limit switches, blower motor issues, or thermostat and wiring faults. Gas furnaces can also be affected by venting or safety controls that respond to flame and airflow conditions. Electric furnaces may have issues with heating elements, sequencers, or electrical connections. A proper inspection identifies the cause, confirms safe operation, and helps prevent the same problem from returning.