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A dysfunctional furnace can be unsettling, especially during cold weather. One furnace problem you may encounter is your furnace blowing cold instead of warm air throughout your Portsmouth, VA, home. Here are three reasons your furnace could be doing this:

Problem With the Thermostat

People spend up to 90% of their time indoors. With all that time at home, you need to have a furnace that serves you well, especially in winter. The thermostat is the first thing you should check when your furnace is malfunctioning.

Check to see whether your thermostat is set to the “on” or “auto” mode. If your furnace is letting out cold air, it’s likely that it’s set to “on.” This will make the furnace blower constantly run even when the system isn’t warming the air.

When the thermostat is in “auto” mode, the furnace will blow warm air. Sometimes, the thermostat problem is more complicated. If you realize there could be more issues, seek the help of a heating system expert.

Dirty Air Filter

Sometimes, a small component like a dirty air filter could be the one that’s wreaking havoc with your furnace. Dirt can make the air filter clog and make your furnace struggle to push out the heated air.

This issue can develop into an even bigger problem whereby the furnace starts to overheat, making safety sensors turn it off and cool it by blowing cold air on it. Keeping the air filters clean can help you avert this kind of issue.

Dirty Flame Sensor

Once the furnace starts burning, flame sensors kick in to keep it burning. However, this can fail to occur if the flame sensors are dirty. If this is the case, your furnace may begin heating, but not heat for long due to dysfunctional flame sensors.

Our knowledgeable HVAC technicians can help you clean your sensors and fix any other issue your furnace might experience. Contact BAJA Heating & Cooling to learn more about our full range of HVAC services, including furnace installation and maintenance.

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