Many homeowners search for furnace repair st catharines when comfort drops suddenly or the system starts cycling strangely. Check the filter and make sure supply vents and return grills are not blocked, since restricted airflow can trigger safety shutdowns and uneven heating. Gas furnaces also need safe operation. If the AC freezes, turns on and off quickly, or cannot keep up, note the conditions and how long the issue has been happening. Seasonal tune-ups, clean filters, and simple airflow chec...