Today is one of your ordinary winter days in St. Louis, MO. Nothing's more relaxing than coming to a warm and comfy house-and it's highly frustrating once your furnace won't work. Your heating system is known to be incredibly intricate, which is why regardless of your furnace's age, issues can be inevitable.

Read this blog to know the five reasons your furnace is blowing cold air.

Thermostat Setting Is Incorrect

Your thermostat's setting can make anyone feel content in their home. Some want it to be cooler than others. Set your fan to "on" instead of "auto" to let it continuously blow even when your furnace is off or recycling, leading to cool air.

Low Battery

Today's thermostats get the electricity from your home's central power. Some use batteries. If your thermostat's battery is low, it can highly reduce your thermostat's efficiency, affecting your furnace.

Dirty Filter

When did you last clean your filter? If it's more than a few months, then maybe that's why your furnace is malfunctioning. Dirty filters restrict airflow, causing your furnace to overheat. All you need to do is change your air filter and restart your furnace.

Fuel Source Issues

Whether your furnace uses oil, electricity, or natural gas as its source, your burner won't turn on once it depletes. When it's drained, you'll feel cold air coming from your furnace. For example, if your oil-fired furnace runs out of oil in the tank, the burner will fail to light, and your furnace will circulate cold air.

Blown Out Pilot Light

A heating system with continuous pilot light could be accidentally extinguished. If you have tried to light the pilot and it won't work, there might be an issue with your gas valve. Call your trusted HVAC technician to have them service your system.

Burner or Flame Sensor Problems

Burners and flame sensors are sensitive to dust and grime buildup. If any of these two components get dirty, the fuel won't get through the system. Also, these essential parts can undergo wear and tear. When your system's flame sensor is worn down, it can affect your burner's ability to stay on.

If you're looking for dependable furnace repair in St. Louis, MO, don't hesitate to contact us at Environmental Heating & Cooling. Our top technicians are ready to serve your heating needs this chilly winter!