Why Won’t My Furnace Stay Lit?

Are you struggling with your furnace that just won’t stay lit? This common issue can be frustrating, especially during the colder months. At Watson Heating & Air, we understand how crucial a functioning heating system is for your comfort and safety.



In this guide, Watson Heating & Air will answer the question, “Why won’t my furnace stay lit?” When you need furnace repair in Lexington, KY, give us a call.

Faulty Pilot Light: The Most Common Reason a Furnace Won’t Stay Lit

A common reason for furnace ignition problems is a faulty pilot light. The pilot light is a small flame that ignites the gas in your furnace. If it goes out or doesn’t stay lit, your furnace won’t ignite. This could be due to a variety of factors, each impacting the pilot light in different ways. 

Understanding these can be key to troubleshooting and resolving the issue effectively. Regular cleaning and inspection can help prevent these issues.

Pilot Light Issues and Solutions

When your furnace won’t ignite, it’s essential to start with some basic troubleshooting. The problem could range from simple pilot light issues to more complex gas furnace problems.

Understanding the root cause is the first step in resolving the issue. Here are some common causes of pilot light problems:

• Dirty Pilot Light: Over time, dust and debris can accumulate on the pilot light, affecting its ability to stay lit. This is often visible as a weak or yellow flame, rather than the steady blue flame that is ideal.
• Malfunctioning Thermocouple: The thermocouple is a safety device that shuts off the gas if the pilot light goes out. If it’s faulty, it may incorrectly read that the pilot light is out and cut off the gas supply, preventing the furnace from igniting.
• Gas Supply Issues: Problems with the gas supply, such as low pressure or blockages in the line, can prevent the gas from reaching the pilot light. This can result in the pilot light failing to ignite or going out unexpectedly.
• Drafts or Airflow Problems: Sometimes, drafts near the furnace can blow out the pilot light. Ensuring proper ventilation while protecting the pilot light from direct drafts is important.
• Faulty Pilot Light Control Valve: A less common but possible issue is a defective control valve. This valve regulates the gas flow to the pilot light. If it’s not functioning correctly, it can prevent the pilot light from staying lit.

Regular heating system maintenance can prevent many of these problems, but sometimes, even well-maintained systems can face unexpected issues. For routine furnace maintenance and repairs to fix a pilot light that won’t stay lit, contact a local HVAC company.

Understanding Gas Furnace Problems

If you want to answer the question, “Why won’t my furnace stay lit?” you need to understand the different types of problems it can experience.

Gas furnaces are complex systems, and various components can malfunction, leading to the burners not staying lit. Issues with the gas valve, flame sensor, or even the thermostat can cause your furnace to malfunction. It’s important to have a professional assess and repair these components to ensure safe and efficient operation.

When To Call an Expert for Heating System Maintenance

If your furnace won’t ignite despite your troubleshooting efforts, it might be time to call in the experts. Professional technicians can diagnose and fix the problem, ensuring your furnace operates safely and efficiently. Remember, attempting to repair a furnace without proper knowledge can be dangerous and may lead to further damage.

Regular heating system maintenance is crucial for the longevity and efficiency of your furnace. It can help identify potential issues before they become major problems. Maintenance includes cleaning the furnace, checking for leaks, inspecting the wiring, and ensuring all components are functioning correctly. This proactive approach can save you time and money in the long run.

Call Watson Heating & Air for Furnace Troubleshooting

If your furnace won’t stay lit, pilot light issues and more complex gas furnace problems could be the root cause. Regular heating system maintenance can prevent many of these issues. However, if you’re facing persistent problems, it’s best to seek professional help.

At Watson Heating & Air, we specialize in diagnosing and resolving furnace issues. If your furnace fan keeps running or you’re facing other heating system challenges, our team is here to help. With our expertise, we ensure your furnace operates efficiently and safely. For assistance with questions like, “Why won’t my furnace stay lit?” call us at (859) 448-1054. Trust Watson Heating & Air for all your heating needs.