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6 Reasons Your Furnace Is Blowing Cold Air and How To Fix It

By Eco Temp HVAC October 3, 2023

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Reasons Your Furnace is Blowing Not Blowing Warm Air & How To Can Fix Them

When the frosty winds howl, the last thing you want is a furnace that’s blowing cold air. Fortunately, understanding potential culprits can help you address the problem efficiently.

  1. Dirt & Grime on the Flame Detector:

    Some modern furnaces don’t use pilot lights. Instead, they depend on flame detectors for the heating process. If dust and dirt mask this flame sensor, the furnace might start emitting cold air. A simple cleaning of the flame sensor can resolve this issue. Alternatively, Chicagoland homeowners can consult professionals like those at Eco Temp HVAC for expert cleaning

    Tips & Insights: The Essential Guide to Furnace Flame Sensors

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  2. Blocked Air Filter Restricting Airflow

    A clogged air filter can hinder airflow, causing longer heating cycles and even overheating. This clog might result in your furnace dispersing cold air. A simple solution is replacing the old, dirty air filter with a new, clean one. This change can prevent overheating and promote efficient heating.

  3. Insufficient Gas Supply

    A furnace emitting cold air might signify an issue with your home’s gas supply line. If a furnace isn’t receiving adequate gas, it can’t function correctly. For this, it’s vital to contact experienced HVAC technicians for thorough checks and solutions. It is not recommended to try and repair this without proper knowledge as it is very dangerous.

  4. Clogged Condensate Lines

    Modern furnaces come equipped with condensate drain lines that remove excess moisture. However, if there’s a blockage in these lines, the burners might turn off, causing a cold draft. Checking these lines for potential blockages and cleaning them can rectify the problem.

  5. Damaged Ductwork

    Cold air might be infiltrating through holes or cracks in your home’s ductwork. Though the furnace might produce warm air, by the time it travels through the compromised ducts, it cools down. Duct sealing or cleaning can help in retaining the heat, ensuring warm air circulates in your home.

  6. Thermostat Settings

    A simple check can sometimes solve the cold air issue. If your thermostat is set to ‘On’ rather than ‘Auto’, your furnace will keep running even when not heating. Switching the thermostat to ‘Auto’ will make sure the furnace operates only when heating is needed. Using a smart thermostat can give you more options for energy savings and allow for on-the-go controls.Man using smart thermostat inside of his home.

Tips & Insights: 5 Easy Ways to Keep Your Home Energy Efficient Year Round!

Get Reliable Furnace Repair, Maintenance & Replacement in Chicagoland

Facing furnace issues in the Chicagoland area? Eco Temp HVAC boasts a team of skilled technicians providing comprehensive HVAC repair services in Chicago, IL, and surrounding suburbs. Whether it’s furnace issues, air conditioning malfunctions, or ductwork inspections, we’ve got you covered. Don’t be left out in the cold—reach out at (224) 253-8131 or use our Service Request Form, and let us ensure your home stays warm all winter long.

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Eco Temp HVAC stands as a beacon of excellence for furnace repair and comprehensive HVAC services in Chicago, Lemont, Palatine, Kirkland, St Charles, Downers Grove and the Northwest Suburbs. Our seasoned technicians are adept at servicing a variety of heating systems, encompassing furnaces, boilers, heat pumps, and beyond. Beyond just repairs, we’re proud to offer installation, maintenance, and replacement services, guaranteeing your HVAC systems deliver peak performance all year round. Our unwavering dedication to superior quality and unparalleled customer care solidifies our status as a trusted HVAC service pillar in the community.

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