Many homeowners search for furnace repair st catharines help when comfort drops, the unit cycles on and off, or the home heats unevenly. If you see an error code, write it down and note any new sounds like rattling, squealing, or repeated clicking. For gas furnaces, safe operation matters. Ductwork inspection and service and indoor air quality services can also help when airflow is uneven or dust builds up quickly. If you need furnace repair in St. Catharines or HVAC repair and service, we can help you plan next steps with clear diagnostics and practical repairs.