Why Is My Furnace Blowing Cold Air?

Why Is My Furnace Blowing Cold Air?

It’s freezing inside your house, and you turn to your furnace for some much-needed warmth. But instead of hot air, the furnace starts blowing cold air. If this happens to you, don’t panic. There are a few things you can try before contacting a professional furnace service in Paradise, CA. First, inspect some of the components that might be causing the problem,

Reasons Why Your Furnace Blows Cold Air

Here are some most prevalent reasons that explain why your furnace is beginning to blow cold air:

Bad Thermostat

When the temperature inside your house reaches the desired temperature on the thermostat, it signals your HVAC system to stop the cycle. It begins the cycle again if the room temperature drops. Sometimes, loose wires or old thermostat sensors may cause the thermostat to function improperly.

How to Fix:

  1.  Check the temperature on your thermostat.
  2. Check that it is not turned on.
  3. If it is, return the switch to the auto position. Your furnace should blow warm air after restoring the proper setting.
  4. Replace the batteries if the screen is invisible.

Dirty Air Filter

An air filter is a necessary component of any HVAC system. When these filters are clean, they give clean, fresh air to your home. However, a dirty air filter might cause airflow problems, and the furnace might not get enough air to continue the combustion process.

How to Fix:

  1. If you’re unsure about the state of your air filter, inspect it visually.
  2. Replace it if it appears to be excessively dirty and clogged. Ensure to clean it weekly to avoid airflow problems.
  3. Contact us so we can provide a furnace service expert in Yuba City, CA, to assist with your issue and determine which air filter is compatible with your furnace system to fit your home.

Ignitor Malfunction

An older furnace may have a pilot light to start the combustion process. However, modern furnace models use an electric igniter to ignite gas for combustion. If the pilot light fails or the ignitor fails, the gas will not ignite, resulting in improper airflow from the furnace.

How to Fix:
To properly relight the pilot, follow your furnace’s owner’s manual instructions. You can also contact us for furnace repair in Yuba City, CA, to replace the damaged component and relight the ignition system.

Dirty Flame Sensor

Once started, pilotless ignition furnaces employ a flame sensor to ensure the gases are burning. If the flame sensor is clogged, your furnace will switch on and begin heating but will quickly cool.

How to Fix:
If you’re acquainted with furnace components, you may clean the flame sensor manually, which should restore the heating function of your furnace. Contact us for furnace repair service in Yuba City, CA, if you require further assistance.

Gas Supply

If your gas supply goes out or is just inadequate, the furnace will not be able to produce heat but will continue to run the blower, producing frigid air.

How to Fix:
If it’s a whole-house problem, check with your gas company, or call us for furnace service in Paradise, CA, if the furnace isn’t getting enough gas.

Bottom Line

Having a qualified professional clean and maintain your furnace every year is essential, and no one does it better than Feather River Aire Heating & Cooling technicians. We serve as an HVAC service in Live Oak and assist with residential, commercial, and newly built structures. You can reach us by calling (530) 207-8695 or by, email regarding installation or to schedule a service.

Share This


air purifier
Improve Your Home’s Indoor Air Quality with Our Comprehensive Services
Maintaining excellent indoor air quality (IAQ) in your home is of utmost importance for the comfort, health, and well-being of your family. A variety of factors can affect the air quality within your living spaces, ...
Read More
Expert Electrical Inspection: Ensuring Safety and Compliance in Properties
The safety and reliability of electrical systems are critical factors in maintaining a secure and comfortable living or working environment within residential and commercial properties. Regular electrical inspections play a crucial role in identifying potential ...
Read More
Ensure the Longevity of Your Plumbing System with Professional Repiping Services
As a property owner, maintaining the efficiency and longevity of your plumbing system is crucial to avoiding costly repairs and potential water damage, both in residential and commercial settings. Repiping, or replacing old and deteriorating ...
Read More