Why Does the Pilot Light Keep Going Out?
The pilot light, also known as the burner flame, is a small gas flame that ignites the main burner in gas furnaces, water heaters, and other appliances. A pilot light is typically always burning, even when the appliance is not in use, to ensure a ready supply of hot water or heat. However, for many homeowners, a pilot light that keeps going out can be a frustrating and costly problem. In this article, we’ll explore the common reasons why pilot lights keep going out and what you can do to prevent this issue.
Why Does the Pilot Light Keep Going Out?
There are several reasons why a pilot light might keep going out. Here are some of the most common causes:
- Gas supply issues: A malfunctioning gas valve or a gas leak can prevent the pilot light from staying lit. Check the gas valve to ensure it’s fully open and sniff for gas to detect any leaks.
- Dirty or corroded pilot light assembly: If the pilot light assembly is dirty or corroded, it can prevent the flame from burning properly. Clean or replace the pilot light assembly as needed.
- Incorrect pilot light configuration: If the pilot light is not properly aligned or adjusted, it may not stay lit. Adjust the pilot light according to the manufacturer’s instructions.
- Flawed thermocouple: The thermocouple is responsible for sensing the temperature of the pilot flame and maintaining the gas flow. Check the thermocouple for damage or corrosion and replace it if necessary.
- Gas pressure issues: If the gas pressure is too high or too low, it can affect the pilot light’s ability to stay lit. Check the gas pressure and adjust it according to the manufacturer’s specifications.
- Electronic ignition issues: Modern furnaces and water heaters use electronic ignition systems instead of pilot lights. If these systems fail, the flame will not stay lit.
Common Symptoms of a Pilot Light Problem
If you suspect that your pilot light is not staying lit, there are several symptoms you might notice:
- Appliance not functioning properly: If the pilot light goes out, the furnace, water heater, or other appliance may not heat properly or produce hot water.
- Unpleasant odors: A faulty pilot light can cause the accumulation of carbon monoxide or other gases, which can lead to unpleasant odors.
- Reduced efficiency: A malfunctioning pilot light can cause your appliance to work harder than necessary, leading to reduced efficiency and increased energy bills.
How to Fix a Pilot Light That Won’t Stay Lit
Fixing a pilot light that won’t stay lit usually requires some basic maintenance and troubleshooting. Here are the steps you can follow:
- Check the gas supply: Make sure the gas valve is fully open and there are no gas leaks.
- Clean or replace the pilot light assembly: Dirty or corroded pilot light assemblies can prevent the flame from burning properly. Use a soft brush to clean the assembly, and replace it if necessary.
- Adjust the pilot light: Make sure the pilot light is properly aligned and adjusted according to the manufacturer’s instructions.
- Check the thermocouple: Replace the thermocouple if it’s damaged or corroded.
- Check the gas pressure: Adjust the gas pressure according to the manufacturer’s specifications.
- Use a pilot light kit: If the problem persists, try using a pilot light kit, which includes a new pilot light assembly, thermocouple, and ignition electrode.
Table: Common Pilot Light Issues and Solutions
| Symptom | Causes | Solution |
|---|---|---|
| Pilot light won’t stay lit | Gas supply issue, dirty or corroded pilot light assembly | Check gas supply, clean or replace pilot light assembly |
| Pilot light not lighting | Incorrect pilot light configuration, flawed thermocouple | Adjust pilot light configuration, replace thermocouple |
| Pilot light keeping going out | Gas pressure issues, electronic ignition issues | Check gas pressure, repair or replace electronic ignition |
Preventing Pilot Light Problems
To prevent pilot light problems, make sure to:
- Regularly maintain your appliance: Keep your furnace, water heater, or other appliances regularly maintained to prevent malfunctions.
- Use the correct type of gas: Make sure you’re using the correct type of gas for your appliance.
- Check the pilot light assembly regularly: Regularly check the pilot light assembly for damage or corrosion and replace it if necessary.
- Use a pilot light with a thermocouple: Using a pilot light with a thermocouple can help prevent pilot light malfunctions.
Conclusion
A pilot light that keeps going out can be frustrating and costly. However, by understanding the common causes of pilot light malfunctions and following the troubleshooting steps outlined in this article, you can fix the problem and prevent it from happening again. Remember to regularly maintain your appliance and pilot light assembly to ensure that your pilot light stays lit and your appliance runs efficiently.
