What Should I Do When My Furnace Doesn’t Generate Heat?

Furnace heating problems are common issues that homeowners may face during the colder months. These issues can range from a lack of heat to strange noises coming from the furnace. 

Furnaces are complex systems that rely on a number of components to work properly. Issues can occur if any of these components are not working properly or if the system needs maintenance. 

It is important for homeowners to be aware of common furnace heating issues so that they can take action if necessary. But what can you do when faced with any heating problems? In this guide, we show you what you can do when your furnace is facing heating issues.

 1) Check Your Air Filter

Checking your air filter should be the first step when your furnace isn’t generating heat. A dirty air filter can restrict airflow, causing your furnace to run inefficiently and potentially leading to a lack of heat. 

It is important to check your air filter regularly, as a dirty filter can reduce the efficiency of your system, resulting in higher energy costs. Cleaning or replacing your furnace filter can help your furnace run more efficiently and help it generate more heat.

2) Consider Gas Pressure

Gas pressure is one of the most important factors to consider when your furnace isn’t generating heat. If the gas pressure in your furnace is too low, it can prevent the furnace from igniting and heating your home. 

It could also cause other problems such as pilot light outages, flame impingement, and improper combustion

3) Check for Thermostat Resets

Checking for thermostat resets is an important step to take when your furnace isn’t generating heat. This involves checking the thermostat to ensure that it is set to the correct temperature, and resetting it if necessary. 

If the thermostat is set and the furnace still isn’t working, you should check the electrical circuit breaker and the furnace’s power switch to make sure they are in the on position. If they are and the furnace still isn’t working, it’s time to call in the professionals at Legacy Heating & Cooling.

4) Look at the Sequence of Operation

The fourth step in troubleshooting a furnace that doesn’t generate heat is to look at the sequence of operation. This involves examining the steps that the furnace goes through to get heat from the thermostat to the burners and out of the vents. 

It is important to make sure that the furnace is receiving power, that the thermostat is operating properly, and that all of the necessary switches, valves, and fans are working in the correct order. If any of these steps are not working properly, it can lead to the furnace not generating heat.

Furnace Maintenance Tips for Winter

Furnace maintenance is essential for keeping your home or business warm during the winter months. To ensure your furnace is running efficiently, it’s important to take preventative maintenance steps.

Some key things to remember are that you should be  inspecting and changing your air filter monthly, cleaning the fan blades, checking the blower, and inspecting the vents and ductwork.


By following these four steps, you can effectively troubleshoot your furnace and identify any issues preventing it from generating heat. It is important to remember that furnace maintenance is essential for keeping your home or business warm during the winter, so it’s important to keep your furnace in good working order.

If you find yourself having more furnace heating issues, Legacy Heating has you covered. We offer furnace repair in Edmonton and Calgary areas to keep your systems up and running in no time. Get in touch with us today to learn how.

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