If you're noticing that your furnace's pilot light keeps going out, it can be a frustrating and concerning issue, especially during colder months. Don't worry, you're not alone, and there are several potential causes and solutions to this common problem. Let's dive into understanding why your furnace pilot light won't stay lit and how you can address it.
First, let's ensure we're speaking the same language. The pilot light, also known as the standing pilot, is the small, constantly burning flame in your furnace that lights the burners when you turn up the heat. Now that you've identified the issue, let's find out why your furnace pilot light keeps going out.
Common Causes for a Pilot Light That Won't Stay Lit
There are several reasons why your furnace pilot light might be extinguishing repeatedly. Understanding these will help you troubleshoot the problem more effectively.
Before we delve into the causes, remember that safety should always be your top priority when handling your furnace. Always ensure that the power to your furnace is turned off at the circuit breaker before you start any diagnostic or repair work.
Obstruction in the Pilot Tube
The pilot tube can sometimes become clogged due to dirt, debris, or moisture. When this happens, the pilot light might go out because it can't get enough gas to keep burning.
Cleaning the pilot tube is a straightforward process. First, locate the pilot light assembly, usually at the bottom of your furnace. Turn the control knob to 'Pilot'. Then, using a needle or pipe cleaner, gently clean the pilot tube. Be sure to do this carefully to avoid damaging the tube.
Drafts or Airflow Issues
Strong drafts or improper airflow can cause the pilot light to go out. This could be due to cracks in the heat exchanger, a problem with the draft inducer fan, or loose venting.
To diagnose airflow issues, look for signs of carbon buildup around the pilot light or burners. If you notice any, it's an indication that there might be an issue with your furnace's airflow. In this case, it's recommended to call a professional for a thorough inspection.
Solutions to Keep Your Furnace Pilot Light Lit
Now that we've identified some possible causes for your pilot light going out, let's look at potential solutions to keep it lit.
Remember, if you're not comfortable performing any of these tasks, never hesitate to call a professional HVAC technician. Safety should always be your top priority.
reset and Re-light the Pilot Light
Sometimes, the simplest solution can be the most effective. The first thing you should do when your pilot light goes out is to try resetting and relighting it.
First, turn the control knob to 'Off', then wait a few minutes to allow any gas to dissipate. Next, turn the knob to 'Pilot' and press down while holding a long match or lighter near the pilot light opening. Keep holding the knob until the pilot light stays lit. Then, release the knob and check if the pilot light is still burning.
Inspect and Replace the Thermocouple
The thermocouple is a safety device that senses the pilot light and allows gas to flow to the burners. If it's worn out, it might not sense the pilot flame correctly, causing it to go out.
To inspect the thermocouple, first turn off the power and gas supply to your furnace. Then, remove the access panel and locate the thermocouple. If it's blackened or worn, it might need replacement. Replacing a thermocouple is relatively straightforward, but if you're unsure, it's best to call a professional.
If none of these solutions work, it might be time to consider professional help. A HVAC technician can thoroughly inspect your furnace, identify the underlying issue, and provide the appropriate repair or replacement options. Regular maintenance can also help prevent these issues altogether.
Remember, while it can be tempting to try and fix everything yourself, safety should always be your top priority. If you're unsure about any aspect of your furnace's operation or repair, don't hesitate to call a professional. Don't let a flickering pilot light turn into a bigger problem. Keep your home warm and safe this winter by addressing any furnace issues promptly.