Furnace blowing cold air instead of heat? Discover 7 possible causes, from thermostat settings and restricted airflow to ignition issues and blocked vents. Learn which checks New Jersey homeowners can safely perform and when to call Royalty Heating & Air Conditioning for professional furnace diagnostics.

Learn the 7 warning signs that your furnace may need repair or replacement before winter arrives in New Jersey. Discover how rising heating bills, unusual noises, frequent cycling, and uneven temperatures can signal problems, and when to schedule a professional furnace inspection with Royalty Heating & Air Conditioning.