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Furnace Pilot Light is Flickering
Posted On: March 7, 2025
A flickering furnace pilot light is not normal and could indicate an issue that needs attention. While some slight movement in the flame is expected, excessive flickering or an unstable flame can be a sign of problems such as:
- Drafts or Airflow Issues – Strong drafts from nearby windows, vents, or doors can cause the pilot light to flicker.
- Dirty or Clogged Pilot Orifice – Dirt and debris can restrict gas flow, causing an unstable flame.
- Faulty Thermocouple – If the thermocouple is malfunctioning, it may not properly regulate the pilot light, leading to flickering or even shut-offs.
- Gas Supply Issues – An inconsistent gas supply due to a faulty regulator or valve can cause an irregular flame.
- Cracked Heat Exchanger – In more serious cases, a flickering pilot light may indicate a cracked heat exchanger, which could lead to dangerous carbon monoxide leaks.
If your pilot light is flickering frequently or appears weak, it’s best to have a professional HVAC technician inspect the furnace to prevent potential safety hazards.
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See What Our Customers Are Saying:
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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