Furnace Not Igniting? Here’s How To Fix It!


Are you experiencing trouble with your furnace not igniting? Don’t worry, we’ve got you covered.

In this article, we’ll guide you through some simple steps to troubleshoot and fix the issue. We’ll show you how to:

  • Check the thermostat settings
  • Inspect the pilot light
  • Ensure proper gas supply
  • Clean or replace the ignitor if needed

If all else fails, don’t hesitate to call a professional for assistance.

Let’s get your furnace up and running again!

Check the Thermostat Settings

You should check if your thermostat is set to the correct temperature and mode. Sometimes, the furnace not igniting can be as simple as a wrong setting on the thermostat. So, we need to make sure that it is set correctly.

  • Check if the temperature on the thermostat is higher than the current room temperature. If it’s too low, turn up the heat by adjusting the temperature setting.
  • Next, ensure that the thermostat is set to ‘heat’ mode and not ‘cool’ or ‘off’. It’s easy to accidentally switch modes when using a programmable thermostat. If necessary, switch it back to ‘heat’ mode.
  • Additionally, double-check if your thermostat has fresh batteries and they are properly installed. Weak or dead batteries can cause issues with your furnace ignition. Replace them if needed.

If you have a smart thermostat, make sure it’s connected to Wi-Fi and functioning properly. Sometimes connectivity issues can prevent your furnace from igniting.

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Inspect the Pilot Light

Check if the pilot light is on and properly lit. This is a crucial step in troubleshooting a furnace that isn’t igniting. As homeowners, we often overlook the importance of the pilot light, but it plays a vital role in initiating the combustion process. So, let’s go ahead and take a look.

Firstly, locate your furnace’s access panel. It’s usually located near the bottom of the unit. Open it up and find the pilot light assembly. You should see a small flame burning steadily if it’s functioning correctly. If not, make sure to follow proper safety procedures before attempting any repairs.

If you notice that the pilot light is out or flickering, it may need to be relit or cleaned. Carefully follow your furnace manufacturer’s instructions for relighting the pilot light, as they can vary depending on your specific model.

In some cases, even after relighting, the pilot light may continue to go out repeatedly. This could indicate an underlying issue with components like thermocouples or gas valves that require professional attention.

Remember that working with gas appliances can be dangerous, so don’t hesitate to contact a qualified technician if you’re unsure about handling any part of this process. Safety first!

Ensure Proper Gas Supply

To ensure proper gas supply, we make sure the gas valve is turned on and supplying fuel to the pilot light. Without enough gas, the furnace won’t ignite and provide warmth to our home. It’s important to regularly check the gas valve to ensure it is in the correct position. If it’s a manual valve, we turn it counterclockwise until it stops to open it fully. For automatic valves, we usually just need to flip a switch or press a button for the gas to flow.

Once we’ve confirmed that the gas valve is on, we should also inspect the pilot light itself. A weak or extinguished pilot light can be another reason why our furnace won’t ignite. We look for any signs of dirt or debris obstructing its flame. Using a small brush or compressed air, we carefully clean any buildup around the pilot light.

If everything looks fine with both the gas valve and pilot light but our furnace still isn’t igniting, it’s crucial not to attempt any further repairs ourselves. In these cases, calling a professional HVAC technician is recommended as they have the knowledge and tools necessary to safely diagnose and fix more complex issues with our heating system.

Clean or Replace the Ignitor

Once we’ve confirmed that the gas valve is on and the pilot light is clean, it’s important to inspect and potentially replace the ignitor if necessary.

The ignitor plays a crucial role in starting the furnace by creating a spark that ignites the gas. Over time, ignitors can become worn out or damaged, leading to ignition problems.

To begin with, we should visually inspect the ignitor for any signs of damage or wear. Look for cracks, discoloration, or broken wires. If any issues are found, it’s best to replace the ignitor right away.

Next, we need to test the functionality of the ignitor. This can be done using a multimeter to check for continuity. If there is no continuity in the circuit, it means that the ignitor has failed and needs to be replaced.

When replacing an ignitor, it’s important to choose one that is compatible with your furnace model. Refer to your furnace’s manual or consult a professional for guidance on selecting the correct replacement part.

Call a Professional for Assistance

If you’re unsure about how to inspect or replace the ignitor, it’s best to call a professional for assistance. Dealing with furnaces can be tricky and potentially dangerous if you don’t have the proper knowledge or experience.

We understand that you might want to save some money by attempting repairs yourself, but when it comes to issues like ignitor replacement, it’s always better to leave it to the professionals.

Calling someone like ALP Heating for assistance ensures that the job is done correctly and safely. They have the expertise and tools necessary to handle any furnace-related problems effectively. Additionally, professionals are trained in troubleshooting and diagnosing various furnace issues, so they can quickly identify if there are any other underlying problems causing your furnace not to ignite.

Moreover, professionals can provide valuable advice on maintaining your furnace properly and preventing future problems. They may also offer warranties or guarantees on their workmanship, giving you peace of mind knowing that your furnace will be in good hands.

Furnace Not Igniting – FAQ

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How do I check the thermostat settings on my furnace?

To check the thermostat settings on our furnace, we can follow a few simple steps.

– First, locate the thermostat and ensure it’s set to ‘heat’ mode.
– Then, adjust the temperature setting higher than the current room temperature.
– Next, listen for any clicking sounds near the furnace indicating that it’s attempting to ignite.

If there’s no clicking or if the furnace still doesn’t ignite, further troubleshooting may be needed to determine the cause of the issue.

What should I do if the pilot light on my furnace is not igniting?

If the pilot light on our furnace isn’t igniting, there are a few steps we can take to troubleshoot the issue.

– First, we should check if the gas supply is turned on and if the pilot light area is clean of debris.
– Next, we can try relighting the pilot light by following the manufacturer’s instructions.
– If these steps don’t work, it’s best to contact a professional HVAC technician to inspect and repair our furnace.

How can I ensure that my furnace is receiving a proper gas supply?

To ensure that our furnace is receiving a proper gas supply, we need to take a few steps.

– First, check if the gas valve is open. If it’s closed, turn it on and listen for the sound of gas flowing.
– Next, inspect the gas line for any leaks or damage.
– Finally, make sure there are no blockages in the gas supply line or burner jets.

Regular maintenance and professional inspections can also help ensure a smooth gas supply to our furnace.

When should I clean or replace the ignitor on my furnace?

We should clean or replace the ignitor on our furnace when it shows signs of wear or damage.

It’s important to regularly inspect the ignitor for any cracks, corrosion, or breakage.

If the ignitor is visibly worn out or fails to glow when the furnace is turned on, it’s time for a replacement.

Cleaning or replacing the ignitor ensures proper ignition and helps prevent issues like a furnace not igniting when needed.

What are the signs that indicate I should call a professional for assistance with my furnace?

If your furnace is experiencing issues, there are several signs that indicate it’s time to call a professional for assistance.

These include:

– Strange noises coming from the furnace
– A sudden increase in energy bills
– Inconsistent heating throughout your home
– Unusual smells like burning or gas

It’s important to address these signs promptly to avoid further damage and ensure the safety and efficiency of your furnace.


In conclusion, if your furnace is not igniting, there are a few steps you can take to troubleshoot the issue.

  • First, check the thermostat settings and make sure they are correct.
  • Next, inspect the pilot light and ensure it is lit.
  • Also, check that there is a proper gas supply to the furnace.

If none of these solutions work, try cleaning or replacing the ignitor.

However, if all else fails, it’s best to call a professional for assistance to avoid any further damage or safety risks.

Furnace Ignitor Repair Service at Your Location

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