3 Common Reasons Why Your Furnace is Not Lighting


Having a furnace that isn’t lighting can be a major inconvenience, especially during cold winter months. If you’re experiencing furnace issues, you’ll want to know the reasons why it might not be working properly. In this article, we’ll cover the three most common explanations for a furnace not lighting, so you can get your home warm and cozy again without delay. Read on to learn more!

1. Pilot Light Issues

The most common cause of a furnace not lighting is an issue with the pilot light. Pilot lights are small flames that ignite your furnace’s main burner. If your pilot light isn’t working properly, the gas won’t be able to reach the flame of your furnace, and it won’t be able to light.

To check if your pilot light is the issue, look for a small blue flame coming from the burner’s nozzle and make sure it’s lit. If you don’t see a flame, try relighting the pilot light by following the instructions in your furnace manual. However, it is rather best to seek HVAC service in Atlanta to do the job. This is because they will not only ensure that the pilot light is lit properly but also double-check other furnace components to ensure proper heating.

2. Dirty Filters

Dirty filters that aren’t replaced regularly can cause a furnace to not light. Filters are responsible for trapping dirt and debris, so they don’t enter your furnace system and cause damage. If they become clogged, the airflow to your furnace can be blocked, preventing it from lighting properly. In this case, simply replacing your filter and cleaning out the furnace can get it up and running again. You may also learn the furnace troubleshooting tips & steps to ensure safe furnace operation and an efficient system.

3. Bad Thermostat Connection

A bad connection between your thermostat and furnace can also prevent a furnace from lighting. If the connection is broken, your thermostat won’t be able to send the necessary signals to your furnace, and it won’t be able to light. Look for any faulty wiring or corroded terminals, then replace them as needed. You must also check your thermostat’s batteries to ensure they are working properly.

To Conclude

These are the top 3 most common explanations for a furnace not lighting. If you’re experiencing furnace issues, check these possibilities before calling in a professional and trying to troubleshoot the problem. This way, you can quickly and easily get your furnace running again.