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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
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Dirty Pilot Orifice
Dust, debris, or soot can clog the pilot orifice, reducing or extinguishing the flame.
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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.
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Drafts or Airflow Problems
Strong drafts near the furnace can blow out the pilot light.
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Gas Supply Issues
Insufficient gas pressure or a gas valve issue can prevent the pilot from staying lit.
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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:
Jan 1, 2015
Dave was great in helping me get the proper units for my property, as well as getting them installed. The installers arrived when they said they would, and completed the project on time, and professionally. If I needed another furnace, I would use Dave again.
Jan 1, 2015
I have known Greg and Grant Dainty for many years and have used their company for my house and business. I recommended them also for my parents and sister and they all have been very satisfied with the quality of work for a reasonable price. I just recently had them install a new HVAC system in an older house and was very pleased with their work. Craig in Pickering. After meeting with various heating and air conditioning contractors I was referred to Twin Tech Heating and Cooling through a family member. Greg and Grant arrived at my home and provided me with an estimate and a plan as to how they were going to remove and replace my furnace and air conditioner. On the day of install Greg and Grant arrived at my home on time and were very professional and extremely courteous as to any questions or concerns that I had. The removal and install was truly professional and the attention to detail was exactly what I was looking for. Ive seen many installs from other contractors and I couldnt be any happier to have had such a clean looking install. The sheet metal work, ducting and venting all look fantastic. Upon completion Greg and Grant left me feeling extremely happy and very fortunate of a job well done. Thanks again Twin Tech!!
Jan 1, 2015
My old furnace had finally broken down for the last time when contacted twintech to have a new furnace installed They were prompt, knowledgeable and very reasonably priced. They did such a great job i tell all my friends and family about this company.
Jan 1, 2015
To whom it may concern, I recently had TwinTech (Greg and Grant Dainty) replace my furnace and service both my gas fireplaces and air conditioning unit. They were professional, courteous and very fair in their pricing. I would gladly recommend TwinTech to anyone needing work done. I can be contacted at 905-626-XXXX.
Jan 1, 2015
My Fiancé and I have relied on Twintech Heating and Cooling now for the better part of the last 10 years. In that time, Greg has installed a furnace, an air conditioner, and a heat-pump at our residence in Toronto. In each instance Greg and his team were a pleasure to deal with. They were courteous and professional throughout the whole process and the quality of their work is first rate. Our experiences have always been extremely positive and we have referred his services numerous times to our friends and family. Without hesitation, I would recommend Greg and TwinTech Heating and Cooling to anyone looking to service or replace their existing heat/AC equipment
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