Furnace Not Working? Here Are 3 Possible Reasons Why

It’s a question we hear all the time: Why is my furnace not working? At Gross Heating & Air Conditioning, we know there could be many reasons—which is why we’re here to help solve them all. Our experts are sharing some of the most common furnace problems below. Read through them (and some of their quick fixes) and call us at 262-783-6000 if you need more help.

What Can Cause a Furnace to Stop Working?

Clogged Air Filter

One of the simplest ways to troubleshoot furnace problems is to replace your air filter. These filters are designed to fit into your heating system and catch contaminants like dust and dirt as they pass through. While great for your indoor air quality, these pollutants can build up over time and block airflow.

Changing your filter every one to three months can help keep your home clean and warm all winter long.

Wrong Thermostat Settings

Another simple reason your furnace is not coming on—your thermostat is not set properly. Here’s a quick checklist to see if your thermostat is the problem:

• Make sure it’s on and set to “heat.”
• Turn the temperature up a few degrees to see if the system responds.
• Change the batteries and repeat the above steps.

Broken or Faulty Parts

Sometimes your furnace will not turn on because something deeper is wrong inside the system. If you’ve tried other fixes on this troubleshooting guide and nothing worked, it’s time to call in reinforcements.

Gross Heating is a Carrier® Factory Authorized Dealer, which means we have the tools and know-how to restore your furnace to its former glory. All you have to do is call us at 262-783-6000 or contact us online.