Why Is My Heater Blowing Cold Air? 8 Surprising Reasons!

Why is my heater blowing cold air? The reasons are straightforward: the air filter has to be changed, the pilot light has gone out, ductwork leaking already, a clogged condensation line, the furnace not drawing gas, the oil filter is already dirty, faulty parts, and upgrade is needed.

Furnace essentially works with the temperature that drops in the forties or below at night, which continues from December to February.

Why is my heater blowing cold air

And imagine the cold front experienced last year. People who have a compromised immune system and even older folks can share safety issues with a broken furnace. So, run through the reasons why my heater is blowing cold air.


Several Reasons Why My Heater Blowing Cold Air

Now, it’s time to answer your question: why is my heater blowing cold air? Here are the following reasons:


#1. Ail filter continues to accumulate in dirt and dust

An air filter is essential as it keeps the air inside a home clean while removing toxins. Plus, it prevents dust as it overworks the HVAC system. If you don’t replace the air filter, dirt and dust will accumulate. Air will not flow freely through its filter. It means to say the furnace struggles against their battle. Replace the furnace filter, mainly as you use the heater regularly. Perform the replacement after every ninety days for those homes without pets, after sixty days for those homes with only a single pet, and after thirty days for those homes with just two pets or if someone is asthmatic or allergic.


#2. The pilot light has gone out

The majority of systems depend upon fuel in heating air inside a home. The furnace features its pilot light, so the energy is heated. If it goes out, the heating begins to blow cold air. It’s not ordinary to see these lights go out unexpectedly. Check the underneath section of the furnace if the light is finally gone. If there’s no flame, begin as you turn off its thermostat. Light the pilot again. There’s often a special button in most modern furnaces. The older furnaces require that you physically light them using a lighter.


#3. A leaking ductwork

Always remember that every ductwork type is exposed to leaks. Ductwork can leak up to thirty percent of the air in the average home. Flexible ductwork is most exposed for tear and wear. Nonetheless, sheet metal is not exempt from leaks. As the ductwork leaks, that also pulls the cold air surrounding it. If it is cold outside, air that floats the crawlspace and attic also gets frigid lacking in proper insulation.

The hot air mixes with the cold air pulling the temperature down the surface, as this is one significant reason a heater blows cold air. If you do not check the ductwork recently, rely on the experts to run a complete inspection on it. They will seal up the leaks and remove that grime from the ductwork. That way, it won’t blow into breathing air.


#4. Clogged condensation

An energy-efficient furnace is suitable for your wallet and your environment. However, it comes with specific issues. One issue is its condensation line. In heating, the furnace produces condensation and even more of it. The drainage line in the furnace removes the water, only clogged pipes. Since it has no place to go, the furnace stops to heat the air while the water also backs up, as this is not something good to experience.


#5. Furnace not drawing adequate amount of gas

An issue with the gas line can result in a furnace shutting itself off. Nevertheless, the heater may continue to run but will result in the heating and blowing of cold air.


#6. Faulty parts

HVAC systems have so many moving parts, the same as cars. They demand regular tune-ups. That’s when things could break down. And that is just life. These faulty parts can result in the heater blowing cold air due to the following reasons:

  • Broken or dirty gas valves
  • Faulty thermocouples
  • Damaged electronic ignition

These labor and certain parts are not shockingly expensive. Still, it’s harmful to try fixing them yourself.


#7. Dirty oil filter

Older homes use furnaces, but they depend on oil rather than gas to heat the air. But an oil-powered furnace has a second filter suitable for gas which gets gross and dirty.


#8. An upgrade is needed

Older systems indeed don’t need repairs. If your heater continues to blow cold air, it’s better to do an upgrade. Replace it instead of repairing it. For one, newer HVAC systems are efficient in energy use. Every month, save more money on heating bills and benefit more from tax credits.


Call For Professional Help!

If you have already fixed the heating system as it blows cold air, but you’re not comfortable with other parts, call for professional help. The expert technicians are ready to check the ductwork leaks that you could not see. They will give a complete tune-up of your system. So far, the majority of repairs are not expensive either! Here are 10 reasons why your heater blowing cold air.


It’s A Wrap!

Now you know the answer to “why is my heater blowing cold air?” And it’s because of several reasons cited. Ensure to check the heater and do some possible fixes for it. And more importantly, call for help if it cannot be fixed DIY! You may want to read related articles; know how to clean a wall heater and where to place a space heater.

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