December 5, 2019

Why is my furnace blowing cold air?

 

If you are Googling, “why is my furnace blowing cold air?” you probably aren’t having the greatest of mornings. We’ve all been there. It’s frustrating when furnaces break down, especially when they are needed most.

If you are experiencing a frustrating morning, and you woke up to a cold house, call Schomburg Heating and Cooling at 816-238-0032. We offer furnace service in St. Joe, Camden Point, Dearborn, Platte City, Smithville, Weston, and the surrounding areas. We will be happy to diagnose the problem of why your furnace is blowing cold air. We will even fix the problem as well.

What could be wrong? It could be several different issues.

Is the fan set to on?

If your furnace seems to blow hot air sometimes and cold air other times, your system’s fan may be set to “on.” This means your fan is continually blowing, but sometimes the air is not heated.

Is your air filter dirty?

How long has it been since you have changed your furnace filter? If it’s been a while, this may be the cause of your furnace blowing cool air. If your furnace was overheating because of a lack of airflow, the high limit switch might have been tripped causing your furnace not to function. You may need to have a Schomburg service technician come to reset your furnace.

Is your pilot light not lit?

 

If you have an older furnace with a standing pilot light, the cool air blowing from your vents may mean that the pilot light isn’t lit. Look for the instructions on how to light your pilot light for your particular furnace or give Schomburg a call. Always seek help from a technician if your pilot light won’t stay lit.

If you have been through this checklist, and you are still experiencing cool air from your vents, there may be some other issue with your system. Send Schomburg a message, and our techs will arrive at your house with diagnostic tools. We will find out why the furnace isn’t performing like it should and give you a quote on how much it will cost to fix or replace it.

Why should you trust Schomburg with your heating system?

First of all, we are a highly- rated company. Look at our reviews to see testimonies from our satisfied customers.

Second, we work on a huge list of furnaces and heat pumps. Our list includes Trane, Mitsubishi, Amana, Goodman, Armstrong, American Standard, Lennox, Carrier, Coleman, LG, Samsung, Heil, Rheem, Ruud, Bryant, Payne, ArcoAire, Janitrol, and Sanyo.

Third, our staff is trained by the manufacturers and are NATE (North American Technician Excellence) certified.

Finally, Schomburg Heating and Cooling has been around since the early 1990s. You don’t last 28 years in this business by providing bad service.

Hopefully, your furnace is blowing cold air for an easy-to-fix reason. Whether the problem is easy to repair or not, we will work hard to get warm air circulating through your house as fast as possible.

February 20, 2026
Unlike portable units, high-performance purifiers integrate directly with your HVAC system to scrub every cubic foot of air in your home simultaneously. These systems trap 99.97% of invisible threats, including Missouri pollen, mold spores, and viruses that standard 1-inch filters simply cannot catch. Cleaner air reduces respiratory strain for allergy sufferers while preventing dust buildup that can choke your HVAC system and lead to costly repairs. Maintaining a clean home in Smithville involves more than just dusting furniture and vacuuming carpets. While those tasks keep a house looking sharp, the most significant threat to your family's health is often the air you can’t see. Because modern Missouri homes are built airtight for energy efficiency, they inadvertently trap a concentrated mix of local pollen, pet dander, and microscopic dust mites inside. Instead of escaping, these allergens recirculate through your living spaces, making indoor air quality a vital part of home maintenance. Common Indoor Air Quality Obstacles Many homeowners wonder if their indoor air is actually polluted. Since most pollutants are too small to see, the signs often show up in other ways, like frequent sneezing, itchy eyes, or a lingering stuffy feeling in certain rooms. In Smithville, the challenges are twofold: the natural environment and the structural realities of modern construction. The Limitations of Standard HVAC Filters A primary issue is the limitation of standard HVAC filters . Most 1-inch pleated filters are designed to protect the heating and cooling equipment from large dust bunnies and debris that could clog the blower motor or coat the coils. They are not designed to clean the air for human consumption. Small allergens like mould spores and bacteria simply pass through these basic filters. When these particles pass through a standard filter, they don't just disappear. They settle into the ductwork, only to be blown back into the living room the next time the furnace or AC kicks on. This creates a cycle of re-pollution. Missouri-Specific Allergens and Pollutants Smithville is surrounded by beautiful landscapes, but that proximity comes with a high pollen count. From the oak and hickory trees to the vast fields of ragweed, the outdoor air is often thick with triggers. These particles hitch a ride on clothing, enter through open doors, or seep through tiny gaps in window seals. Once inside, they become trapped. Beyond nature, there are chemical factors. Cooking odours, smoke, and volatile organic compounds from household cleaners, paints, and new furniture contribute to poor air quality. These are not solid particles but gases. In a climate like ours, where windows stay shut for most of the year to maintain temperature control, these gases linger in the air long after the activity has finished. The Impact of Humidity on Air Health When indoor humidity levels climb above 50%, it creates a breeding ground for dust mites and mould. Mould spores are particularly troublesome because they are incredibly light and easily airborne. Without a high-performance system to catch these spores, they can colonize different parts of the home, leading to persistent odours and health concerns that a simple vacuum cannot fix. Strategies for Cleaner Indoor Air Improving the air requires a multi-layered approach. The first move is source control, minimizing the amount of dirt and chemicals brought into the home. However, total prevention is impossible. This is where high-performance purification becomes the primary line of defence. These systems are vastly different from the standard filters found in big-box stores. The Technical Power of Advanced Electronic Fields High-performance systems utilize a patented process that creates several strong electrostatic fields. As air passes through these fields, particles are given a powerful charge. Instead of just hoping a particle gets snagged in a mesh, these systems force them to stick to collection cells like a magnet. This method is incredibly effective, capturing up to 99.98% of airborne allergens down to 0.1 microns in size. By targeting particles three times smaller than what many other high-end systems can reach, we ensure that even the finest dust and bacteria are removed from the air. Managing Gases with Activated Carbon and Oxidation Solid particles are only one part of the problem. To handle smells and chemical vapours, advanced oxidation and carbon stages are often required. Air purifiers often have systems like the Air Scrubber with ActivePure Technology that use a specialized catalytic process. This system transforms the moisture in the air into antimicrobial agents that are released back into the home. These agents act like a cleaning squad in the air, seeking out and destroying odours, smoke, and volatile organic compounds. If you have pets, enjoy cooking with strong spices, or have recently renovated a room, this technology provides odour control that a simple filter cannot match. Whole-Home Integration vs. Room Units Portable air purifiers are useful for single rooms, but they have significant limitations. They can only clean the air in their immediate vicinity, and they often struggle to move enough air to make a dent in a large living area. They also take up floor space and create noise. By installing high-performance air purifier systems directly into your HVAC ductwork, you can turn your entire heating and cooling system into a high-performance air scrubber. Every time your system circulates air, it is cleaned and redistributed equally to every room. It operates silently, stays out of sight, and ensures that the air in your upstairs bedroom is just as fresh as the air in your living room. Extending the Life of Your HVAC Investment Every HVAC system is a significant financial investment. When the air is heavy with dust and dander, your furnace and air conditioner have to work harder to pull air through increasingly clogged internal components. This added strain leads to higher utility bills and, eventually, premature part failure. A high-performance air cleaner acts as a pre-filter for your entire system, keeping the blower motor and evaporator coils pristine. This reduction in friction and buildup can add years to the life of your equipment, effectively paying for itself through lower repair costs and deferred replacement. The Silent Connection Between Air Purity and Mental Clarity For those who work from home or have students studying in the house, the brain fog often attributed to a long day might actually be the result of poor air circulation and stagnant pollutants. High-performance purifiers do more than just remove allergens; they reduce the chemical soup of contaminants that can cross the blood-brain barrier and trigger systemic inflammation. By maintaining a lower level of these microscopic stressors, a whole-home purification system essentially creates an optimized environment for focus. Furthermore, this improved air quality works wonders throughout the night, acting as a foundational element for truly restorative sleep. When your body can rest without the burden of processing low-level irritants, it transitions more naturally into those deep, slow-wave sleep cycles that are so vital for health. You wake up feeling genuinely refreshed, energized, and ready to take on the day, a life-changing boost in vitality that comes from the silent, constant protection of a high-performance system. Why Choose Schomburg Heating & Cooling At Schomburg Heating & Cooling , we bring over 30 years of local experience to every project. We are a family-owned business that has grown alongside the Smithville and St. Joseph communities. We understand the specific environmental factors that affect the Northland area because we live here too. When we visit a Smithville home, we evaluate your specific layout and ductwork to match your family's unique needs, whether you're managing severe asthma or simply looking to reduce dust. Because we are HVAC experts first, we prioritize your system's health alongside your air quality. We ensure your static pressure is perfectly balanced, calibrating high-performance filters so you get maximum purification without straining your furnace or AC motor. With over 30 years of experience, we don't just add a filter; we optimize your entire system for comfort and longevity.  If you are ready to see the difference that professional-grade air purification can make, contact Schomburg Heating & Cooling today . Call us to schedule a free estimate for your home. Let us help you turn your home into the clean-air retreat you deserve.
Man in gray shirt installing an air conditioner on a beige office wall.
December 18, 2023
The HVAC system is tasked with keeping your home comfortable is often a significant investment. Like any major appliance, it requires regular care to operate at its best. At Schomburg Heating and Cooling, we believe that preventive maintenance is key to extending the lifespan of your HVAC system, ensuring it runs efficiently and reliably year-round.
Collection of Lennox brand HVAC units, various sizes, dark gray.
November 22, 2023
As the chilly months approach, keeping our homes warm becomes a priority. While furnaces play a crucial role in this, it's vital to remember that safety is paramount when operating any heating system. At Schomburg Heating and Cooling, we're dedicated to keeping your home comfortably warm and ensuring it's safe. This blog post will cover essential furnace safety tips to help you enjoy a warm, risk-free winter season.
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