Why is Your Furnace Blowing Out Cold Air?

Posted - February 28, 2022
Furnace Blowing Cold Air Furnace Repair Dallas TX

As Texans begin to settle into the heart of an unpredictable winter, their furnace’s reliability quickly becomes a huge concern. Warmth during the colder months is essential, and when your furnace begins to blow out cold air, this could indicate a massive problem with your system.

Whether you haven’t had regular furnace maintenance or the cold air seems like a random incident, cold air blowing is something you want to take care of right away.

Here’s a closer look at some of the most common reasons behind a furnace blowing out cold air and what you and your local HVAC professionals can do to get the heat back on in your home.

Your Thermostat’s Fan is ON

If your thermostat’s fan is set to “on” instead of “auto,” this could be the main reason behind your cool air problems. When your fan is constantly running, your heating system will always be blowing throughout the day, however, when it’s not producing heat due to the fan being on, cool air will move through the vents.

Usually, switching the fan to “auto” fixes this furnace issue and helps ensure a home remains properly heated.

Clogged Air Filter

One of the easiest ways to prevent warm air from reaching your air ducts is to never change out your air filter. Your air filter in your furnace should be replaced every few months or whenever it becomes visibly dirty.

If your air filters are all clogged up, your furnace can’t properly receive airflow and eventually overheats. When this happens, your burners are turned off as a safety precaution and your fan continues to blow in order to cool down the system.

If cold air is flowing from your furnace, changing your air filter is the first step towards figuring out the issue. If a new filter ends in heat, congratulations, enjoy the rest of the winter.

However, if a new filter doesn’t resolve the problem, it’s time to consider the following issues that each require the help of an experienced HVAC professional.

Pilot Light Failure

If your furnace won’t blow out hot air, your pilot light may be out which leads to ignition system failure. If your pilot light is out, it’s recommended that you follow your furnace’s instruction manual for relighting your pilot light.

If you do this and the problem persists, it is time to reach out to an expert for inspection, repairs, and replacements.

Dirty Flame Detector

If your furnace doesn’t rely on a pilot light for ignition, your flame detector may be dirty and cause short cycling and cool air in your heating system. If your flame detector is dusty or grimy, your furnace won’t be able to produce heat.

In order to effectively clean your flame detector, reach out to the professionals of Advanced Home Comfort for effective maintenance services that keep your furnace in working condition for years to come.

Duct Issues

Sometimes, the issue may not even lie within your HVAC system. If you haven’t maintained your duct system, damages within your ductwork can lead to the appearance of a faulty furnace.

When ductwork is plagued with holes and leaks, by the time hot air is released into your home, it’s no longer the proper temperature and blows out cool.

Maintain or Repair Your Furnace Today, With Advanced Home Comfort

If your home is experiencing a furnace malfunction that makes it only generates cold air, it’s time to reach out to a local HVAC professional.

The team at Advanced Home Comfort can help you make any repairs or replacements with your HVAC system and ensure your home remains comfortable no matter the temperature you desire.

Contact us today to learn more about our repair and maintenance services. We’ll schedule an in-person consultation that will help us quickly get to the root cause of your problem.