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. HVAC tune-ups often include cleaning, inspection, and basic measurements that support better efficiency and steadier comfort. Keeping notes and acting early often shortens downtime