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Furnace Pilot Light Malfunctioning
Posted On: December 29, 2024
If your furnace pilot light is malfunctioning, it can prevent your heating system from working effectively. Here’s a detailed guide to identify and resolve common pilot light issues:
1. Understand the Problem
The pilot light is a small flame that ignites the burners in your furnace. If it’s malfunctioning or won’t stay lit, your furnace may not generate heat.
2. Common Causes
-
Dirty Pilot Orifice
Dust, debris, or soot can clog the pilot orifice, reducing or extinguishing the flame.
-
Thermocouple Issues
The thermocouple is a safety device that shuts off the gas supply if the pilot light goes out. If it’s faulty or misaligned, the pilot may not stay lit.
-
Drafts or Airflow Problems
Strong drafts near the furnace can blow out the pilot light.
-
Gas Supply Issues
Insufficient gas pressure or a gas valve issue can prevent the pilot from staying lit.
-
Malfunctioning Gas Control Valve
If the gas valve is faulty, it may not release enough gas for the pilot light to ignite.
3. Troubleshooting Steps
a. Inspect the Pilot Light
- Check if the flame is burning. A healthy pilot light should be steady and blue. If it’s yellow or flickering, it may indicate a problem with the gas mixture or airflow.
b. Relight the Pilot Light
- Turn off the furnace and wait for gas to dissipate (5-10 minutes).
- Locate the pilot light assembly and turn the gas control knob to "Pilot."
- Hold down the reset button and use a long lighter to ignite the flame.
- Release the button slowly after 30-60 seconds.
c. Clean the Pilot Orifice
- Turn off the gas supply and use a needle or compressed air to remove debris from the pilot orifice.
d. Test the Thermocouple
- Ensure the thermocouple is in direct contact with the flame. If misaligned, adjust its position.
- If it’s worn out, replace the thermocouple.
e. Check for Drafts
- Seal any openings near the furnace to prevent drafts from blowing out the flame.
f. Inspect Gas Supply
- Verify that the gas valve is open and gas is flowing properly. Consult a professional if there’s a suspected gas pressure issue.
4. When to Call a Professional
- If the pilot light still won’t stay lit after troubleshooting.
- You suspect a gas leak or faulty gas valve.
- There’s a persistent yellow or weak flame.
5. Maintenance Tips
- Schedule annual furnace maintenance.
- Keep the pilot light assembly clean.
- Regularly check for drafts and airflow issues.
- Monitor your furnace’s performance during the heating season.
Addressing a malfunctioning pilot light promptly ensures a warm and safe home. If in doubt, always consult a licensed HVAC technician.
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Aug 16, 2022
Very pleased with the installation of our new furnace and A/C unit. From quotation stage to the completion of the job Twintech was very professional.
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Aug 15, 2022
My old water heater quit on me. I called TwinTech. In less than 4 days, I had my new water heater installed and the old one taken away. The whole process was quick, easy, pleasant, and well done. This is the third time I've dealt with TwinTech and I've been satisfied each time.
Aug 14, 2022
I had them replace my furnace last year. When it came time for the air conditioner this year, I did not hesitate to call Twintech again. I will also have them perform regular maintenance on them.
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Aug 12, 2022
I needed a new furnace and A/C to replace my 21 yr. old units, and went to the internet to view potential companies in May, I received 3 quotes,
and chose Twintech based on their salesman Dave who was very detailed and covered off everything on what Twintech was all about,
an extremely dedicated company with so many years of experience, and after reading the on line reviews I was sold on Twintech, who did not disappoint as the installation team were top notch with Greg leading,
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Aug 8, 2022
We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.
Aug 7, 2022
Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!
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