heating repair and maintenance

Why is my furnace blowing cold air?

If your furnace is blowing cold air, there could be a number of reasons why. It’s important to have your furnace inspected by a professional to determine the root of the problem and to get it fixed before the cold weather sets in. Some of the most common reasons why furnaces blow cold air are a dirty filter, a faulty thermostat, or a problem with the furnace itself.

Dirty filters blocking air flow

Have you ever been in your home, with the thermostat set to a comfortable temperature, and suddenly feel a blast of cold air come out of your vents? Well, if this has happened to you, there is a good chance that your furnace filter is dirty. A dirty furnace filter can cause your furnace to blow cold air, which can lead to an increase in your energy bills. In order to prevent this from happening, it is important to regularly change your furnace filter. Having a yearly maintenance agreement will help prevent your system from being clogged to keep it running all season long. 

Closed or blocked vents blocking air flow

When the furnace is on, but no heat is coming out, the problem is likely a closed vent. This can cause the furnace to blow cold air and not heat up the house. To fix the problem, open the vents and let the furnace run for a while. If the vents are already open, there may be something blocking the airflow, like a piece of furniture. Move the furniture and let the furnace run for a while to see if it fixes the problem.

Leaky ducts venting warm air to the outside

Ducts are an important part of your home’s heating and cooling system, but they can also be a major source of energy loss. In fact, 40% of the air that moves through your ducts is lost due to leaks and poor insulation. This can lead to uncomfortable temperatures in your home, as well as high energy bills. One way to prevent this is to have your ducts inspected and sealed by a qualified technician.

Improper furnace sizing causing inefficient heating

In the winter, your furnace is one of the most important appliances in your home. But if it’s too small, your furnace won’t be able to keep your home warm. And if it’s too big, your furnace will blow cold air. That’s why it’s important to have the right size furnace for your home.

Wrong thermostat settings or improperly installed thermostat

In some cases, the furnace will not turn on at all if the thermostat is set too high or too low. Furnaces are designed to turn on and off as needed. The thermostat is simply a safety mechanism that controls the furnace’s operation by turning it on or off according to the temperature of the inside of your home. If the thermostat was installed incorrectly or if the settings are wrong, you could experience some issues with the temperature of the air leaving your vents. When the thermostat is set too high, the furnace will turn on and off more frequently.

In conclusion, your furnace may be blowing cold air for several reasons. The most common are a lack of fuel, a dirty filter, or a broken igniter. If you’re experiencing any of these problems, call a qualified HVAC contractor for help. They can diagnose the issue and provide the necessary repairs or replacements to get your furnace up and running again. 

Contact Mountaineer to schedule a service appointment for your heating system online or call at (828) 414-6662

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