A properly functioning furnace is crucial for maintaining a comfortable and warm home during the colder months. One common issue that homeowners may encounter is problems with the furnace pilot light. The pilot light is a small, continuously burning flame that ignites the main burner of the furnace when heat is needed. When the pilot light malfunctions, it can disrupt the entire heating system. Today, we at Hal Mechanical would like to share some common reasons behind pilot light issues and provide practical troubleshooting steps for homeowners.

Why Would a Pilot Light Just Go Out?

1) Dirty or Blocked Pilot Orifice: Over time, the pilot orifice—the small opening where the gas is released to create the flame, can become dirty or blocked by debris. This can impede the flow of gas and cause the pilot light to go out.
2) Faulty Thermocouple: The thermocouple is a safety device that detects whether the pilot light is lit. If it senses that the pilot light is not burning, it will shut off the gas supply to prevent a potential gas leak. A malfunctioning thermocouple may mistakenly signal that the pilot light is out, causing the furnace to shut down.
3) Pilot Light Flame Too Weak: A weak or flickering pilot light flame may be insufficient to heat the thermocouple properly. This can lead to intermittent operation or a complete shutdown of the furnace.
4) Gas Supply Issues: Problems with the gas supply, such as a closed gas valve or a disruption in the gas line, can prevent the pilot light from igniting. Checking the gas valve and ensuring that the gas line is clear are essential troubleshooting steps.
5) Dirt or Rust on the Thermocouple: Like the pilot orifice, the thermocouple can accumulate dirt or rust, affecting its ability to function correctly. Regular cleaning is essential to ensure its optimal performance.

Pilot Light Troubleshooting Steps

1) Inspect the Pilot Light: Begin by visually inspecting the pilot light. It should burn a steady, blue flame. If the flame is yellow or flickering, it indicates an issue. Gently clean the pilot orifice using a can of compressed air to remove any debris.
2) Check the Thermocouple: Inspect the thermocouple for dirt or rust. If present, clean it carefully with a fine abrasive pad. If the issue persists, the thermocouple may need replacement.
3) Verify Gas Supply: Ensure that the gas valve is fully open. If it was closed, open it and wait a few minutes before attempting to relight the pilot. If the pilot still won’t light, check for any gas line obstructions.
4) Adjust the Pilot Flame: If the pilot flame is weak, locate the adjustment screw on the gas valve and increase the pilot flame until it burns steadily.

Furnace Inspection, Tune Up, Repair, Replacement & More in Aliante, Anthem, Desert Shores, Eldorado, Enterprise, Green Valley Ranch, Henderson, Inspirada, Mountain’s Edge, North LV, Peccole Ranch, Paradise, Providence, Rhodes Ranch, Seven Hills, Silverado Ranch, Spring Valley, Summerlin, Sunrise Manor, The Lakes, Tuscany Village & Las Vegas Nevada

Troubleshooting furnace pilot light issues requires a systematic approach and attention to detail. Homeowners can perform some of these steps themselves, but if problems persist, it is advisable to seek professional assistance. Regular maintenance and prompt attention to pilot light issues will ensure a reliable and efficient heating system, keeping homes warm and comfortable throughout the winter months. Contact Hal Mechanical if you need furnace repairs in the Las Vegas Valley.