When the weather turns cold at the Jersey Shore, your furnace becomes one of the most important systems in your home. But what happens when you switch it on and discover the vents are blowing cold air instead of heat?
It’s a frustrating experience, but it doesn’t always mean your furnace is failing. Here are some of the most common reasons for cold air and how to know if it’s a quick fix or time for a new furnace installation.
Issue 1: Thermostat Settings
Sometimes the issue starts with the thermostat.
If the fan is set to ON instead of AUTO, your blower will keep running even when the furnace isn’t heating. That means you’ll feel room-temperature air blowing through the vents.
Fix: Switch the fan setting to AUTO so warm air only circulates when the furnace produces heat. If the settings are correct and the system still isn’t heating, schedule a professional inspection.
Issue 2: Dirty Air Filters
Clogged filters block airflow and can cause the furnace to malfunction. When that happens, the safety system may shut down the burners, leaving the blower to push out cold air or no air at all.
Fix: Replace or clean filters every one to three months, depending on your system and household needs. If you’re unsure what filter size to use, Rostron Premium Home Services can recommend the right fit and even set you up with our filter replacement program.
Issue 3: Pilot Light or Ignition Issues
Gas furnaces rely on a pilot light or electronic ignition system to start the burners. If the pilot light goes out or the igniter fails, your furnace won’t heat properly, and you’ll only feel cold air coming through the vents.
Fix: First, make sure your gas supply is on. If the pilot light won’t stay lit or the igniter isn’t sparking, it’s time to call a professional. Working with gas and ignition systems can be dangerous, and a trained technician should always handle furnace repairs.
Issue 4: Clogged Vents or Ductwork Leaks
If certain rooms are getting warm air while others aren’t, you may have blocked vents or leaking ductwork. Over time, dust, debris, or even pests can interfere with airflow. Leaks in the ductwork can also pull in cold air from crawl spaces or attics.
Fix: Start by checking that all supply vents are open and unobstructed. If the problem persists, schedule a duct inspection. Sealing leaks and cleaning ducts improves airflow and efficiency.
Safety Concerns and When to Call a Professional
Call a professional immediately when your furnace isn’t igniting properly, shuts down repeatedly, or you notice unusual smells or sounds. These symptoms can point to gas leaks, electrical failures, or other safety hazards. Rostron Premium Home Service technicians are trained to diagnose and resolve these issues quickly and safely.
Prevent Problems With Seasonal Maintenance
Regular furnace maintenance can help homeowners avoid most cold-air problems. A professional tune-up in the fall ensures your heating system is clean, efficient, and ready for heavy use during winter. Seasonal maintenance also extends the lifespan of your equipment and helps prevent expensive emergency repairs. Become a member with Rostron Premium Home Services, we maintain your heating equipment two times a year!
