Forced hot air furnace blowing cold air

If your furnace is blowing cold air, we empathize with you. The same is true for your ductwork. When a heating cycle begins, and your blower fan turns on, that cool air will blow out of your vents before warm air does.

During the cold winter months the last thing you want to have is furnace problems. Especially if your furnace is blowing cold air. There are many issues that can cause your heater to blow cold air. Typically it is best to have an expert come take a look however, below are some common issues that can result in your furnace blowing out cold air. This is a common issue amongst older furnaces. These older furnaces typically have what is called a pilot light. It is essentially a small flame that is running at all times and is required to light your furnace burners.

Forced hot air furnace blowing cold air

Lost password? Recover password. Remembered your password? Back to login. A furnace blowing cold air indicates that something is amiss. The furnace might have overheated, or there could be an issue with the thermostat, air filter, pilot light, flame sensor, ducts, condensate line, or gas supply. Furnaces are designed to heat homes. If your furnace is not producing warm air, something is wrong. Fortunately, furnaces are relatively uncomplicated appliances. With some basic knowledge of how furnaces work and an understanding of the issues that cause furnaces to blow cold air, you can resolve the problem yourself. Your furnace could be back to heating your home in less time than it takes to call the professional s. Forced-air heating systems are the most common type of furnace.

Furnaces are categorized by the fuel that powers them: natural gas, propane, oil, electric, or wood. The Benefits of Installing a…. If you're comfortable doing so, you can try relighting the pilot following your manual's instructions, but bear in mind that gas is highly flammable.

Furnace maintenance is one of those things that many people put off until winter hits, and they realize that something is wrong. If your find your furnace blowing cold air, here are a few tips to help you find, and potentially fix, the root of the problem. Your furnace fan runs whenever the thermostat calls for heat. You can change it so that it only runs when necessary. However, if you live with other people, you may want to keep an eye on who is pushing the thermostat buttons. When a thermostat battery runs low, it can cause the thermostat to stop working.

Chances are, if the temperature has unexpectedly plummeted inside your home, you may have an issue with your furnace. Before you figure out the problem, it helps to learn a little about how your home heating system might work. The furnace produces heat by burning natural gas or heating oil. When the thermostat is turned on, a pilot light or electronic igniter lights the fuel in a combustion chamber, which begins to warm the heat exchanger, located just above the combustion chamber. A blower fan directs air across the heat exchanger, and when the temperature reaches a certain point, the fan comes on and blows the heated air out into the heating ducts and into the interior of the house.

Forced hot air furnace blowing cold air

If your furnace blows cold air sometimes, you most likely have dirty air filters or blocked air vents. However, it could also be something as minor as the wrong thermostat setting or as complex as electrical circuity failure. Nevertheless, you need to act quickly. Otherwise, you may find yourself in the cold for longer than you thought. Below, we discuss the most common reasons why furnaces blow cold air and recommended fixes. Before we get to the common reasons for blowing cold air, perhaps it would help you understand how the furnace generates warm air in the first place and why cold air coming out of the supply vents is an anomaly. Generally, when you push the furnace button to turn it ON, the ignition system kicks on.

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A return vent is used to draw air from your home into the air ducts and send it to the furnace for heating. Furnace performance declines over time, and they can overheat due to old age. We also offer other HVAC services such as air conditioning repair or replacement. The Best Pet Friendly Plants. And all the hot air might be getting deposited in the basement before it has the chance to reach the far rooms of your house. Airdrie Calgary Chestermere Cochrane. Others can be washed and reused. By switching the thermostat to AUTO, the fan will only blow when the furnace is heating the air. The air coming out of it and being distributed will feel cooler and cooler as the temperature drops. The flame sensor will need to be cleaned. If left alone for too long, this problem could cause more damage. If you need assistance re-lighting your pilot light, give our team a call by phone at to receive assistance. Best Thermostat Temperature Settings for…. Consent is not a condition of purchase, and I can opt-out at any time. Your furnace's circuit control board serves as the brain of the furnace, relaying instructions to its various components.

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This is a common issue amongst older furnaces. If your heater is blowing cold air, this may indicate a severe issue with the gas supply line in your home. Is there an inadequate gas supply? Your HVAC service technician will be able to diagnose the problem and fix it. If the flame detector is covered in dust, dirt, or grime, you will quickly lose heat and your gas furnace will start blowing cold air. Replace the dirty filter with a new one. Yeah, we realize the first issue seems rather silly, but you might be amazed how many people leave their thermostat set to COOL in the early fall and just forget about their HEAT button altogether. Even though the evaporator coil is used for the cooling cycle, due to its location, all treated air must pass by it to enter the supply duct. If you have a central AC and a furnace, then the evaporator coil, which is part of the cooling system, is located inside the furnace. When ductwork has a leak, cold air will enter a duct and blow into your home. It is important to mention that your furnace blowing cold air could ultimately derive from a cracked heat exchanger. The thermocouple is a sensor that controls the gas valve and the ignition. View Our Guarantees. Dirty Air Filter. What to Do If You….