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AAction Air Conditioning & Heating Co. Blog

Why is My Furnace Running but Not Heating the House?


You know your furnace is on, you can hear it fire up, but it’s not doing its job. Whether it’s barely producing warm air or there’s no warm air coming from your vents at all, there’s a problem.

This is an issue that furnace service in Atlanta, GA can fix. Before you make a call, here’s a list of possible issues that your furnace is running into right now.

It Could Be an Airflow Problem

Airflow is far more important than a lot of folks think. Your furnace is classified as a forced air system, so the importance is right there in the name.

Without proper airflow, you’ll run into problems that we’ll mention later on in this post. The best thing you can do to prevent airflow problems is to switch out your air filter regularly.

Every 30 days, your air intake filter needs to be switched out. A new filter improves airflow the second it’s put into place.

Poor airflow leads to performance issues because your furnace has to work harder to produce results. This is the most basic tip to prevent furnace heating issues and may be enough to solve your problem entirely. If not, we have some more points to run through.

Leaky Ducts

If you have warm air coming out, but it’s not warm enough to feasibly change your home’s temperature, it could be caused by leaky ducts.

Your ductwork has an important job: bringing air from the blower motor to your vents and spilling it into your home. There’s a certain amount of pressure inside of your vents that help with this.

When your vents leak, airflow changes drastically, even if it’s a minor leak. The air pressure inside of your ductwork is imperative to your furnace’s efficiency.

Blower Motor Sensor

Your blower motor has a sensor on it to limit the maximum fan speed. We all know from using box fans and floor fans that a high-speed fan produces a cooling effect.

So what happens when a fan that’s supposed to propel your warm air spins too fast? It creates a cooling effect, which basically means you’re wasting money.

The sensor in your blower motor fan (called a resistor) can be replaced. Thankfully, it’s not a very expensive repair, but it is horribly inconvenient and difficult to pinpoint unless you regularly check the temperature near your vents.

While this isn’t a DIY fix, it’s much better than having to replace entire components. These sensors usually last for a long time, but it’s a possibility that you shouldn’t rule out just because it’s uncommon.

Call the Experts

At the end of the day, your furnace needs to work to maintain your comfort and quality of life. If it’s running into any of the issues we mentioned, or it’s simply not working and the repair problem isn’t mentioned here, you need to call an expert. We’re standing by, ready to help you.

Contact AAction Air Conditioning & Heating Co. today to schedule your next furnace repair as soon as possible and restore your family’s comfort.

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