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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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See What Our Customers Are Saying:
May 3, 2020
Reasonable price and the workmanship was prompt and timely and the employees were great to deal with.
May 2, 2020
The sales process was friendly, informative, and very consultative. They worked hard to earn our business by taking a careful look around our home to assess our needs, providing a lot of information about the product, and answering all our questions and finding the right solution for our home at a competitive price. They prepared us very well for what to expect on installation day, and the installation went very smoothly - no surprises, all very professional! They gave us a call after installation to ensure we were happy with the work. We're very happy that we chose to work with TwinTech to get our new furnace.
May 1, 2020
Twintech promptly responded to request for quotation. They were thorough and helpful in explaining options. The quote was very competitive. Installation of new furnace was very professionally completed. Excellent work.
Jan 17, 2020
When our old oil furnace finally broke down we decided it was time to finally convert to natural gas and finally install central air conditioning at the same time. Knowing it was going to be a significant investment for us, we wanted to make the right choice. Twintech came highly recommended by a friend and we were not disappointed. From the first contact with the salesperson, until the final touches on the installation, we were so pleased with their service. Everyone from the company was so friendly, efficient and a pleasure to deal with. Best of all, the cost was very competitive. We would certainly recommend Twintech to anyone requiring HVAC work in their home.
Jan 15, 2020
Mitch from Twintech came out for our annual furnace inspection. We found him to be friendly, conscientious & he left the work area clean. We were also very impressed with the thoroughness of the job he did. This is the 2nd job weve had Twintech do for us & have been very happy with the results for each. We highly recommend this company. Thank you, Mitch, Dave & Greg.
Jan 14, 2020
Work was done on schedule, professionally, according to quote and with minimal inconvenience to building users. Very happy with the end result. The only area for improvement from my experience - need more timely quoting process.
Jan 13, 2020
The team was great! Very knowledgeable, professional and extremely helpful. A few days after install the unit didnt seem to be working, user error, but within minutes of contacting them..on a Saturday.. a tech was on the phone troubleshooting with us. I highly recommend Twintech for your cooling or heating needs. They stand by their products and a pleasure to deal with.
Jan 11, 2020
During the hottest week in the summer our old A/C decided to call it quits. I called Twintech Heating & Cooling after receiving a referral from a family member; came highly rated for being an honest, family-run business, who appreciates their customers. Dave was able to accommodate my hectic schedule and book a late evening appointment to walk through the specifics. Greg and Mitch arrived exactly on time a few days later, were very polite and friendly, and within a couple of hours had a new unit up and running. I also received a follow-up call to ensure we were happy with the Amana.
Jan 10, 2020
They were on time and very professional. I'm so glad I decided to go with Twintech, thanks!
Aug 20, 2019
Timely and appreciated - this was during the hottest days this year when our Air and Furnace way.
Efficient. Professional. No BS or overselling. What was promised, was delivered at a cost-effective price point.
Down to earth.
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