Turn the gas control knob to the “off” position and leave it there for at least five minutes. This pause lets any built-up gas disperse, which reduces the chance of a flare-up. Many homeowners overlook this waiting period, but skipping it can feel unsafe later.

Switch the knob to “pilot” and press it down firmly. While holding, bring a long match or a barbecue lighter close to the ignition port. A steady hand helps, though sometimes the flame resists catching right away. If it doesn’t ignite after a couple of tries, pause again–forcing it rarely works.

Once the small flame burns steadily, keep the knob pressed for about 30 to 60 seconds. This extra hold gives the thermocouple enough time to heat, which prevents the flame from cutting out as soon as pressure is released. Some units require a longer hold; it depends on the model, and I’ve learned the hard way that rushing this part often means starting over.

After releasing the knob, turn it to the “on” position. The main burner should respond with a quiet ignition. If nothing happens, repeat the process, but don’t push more than three attempts in one sitting. A stubborn unit could be signalling a deeper problem–something better handled by a qualified technician from Calgary Air Heating and Cooling Ltd, rather than repeated trials at home.

Locating the Pilot Light Assembly and Safety Instructions

Find the small access panel near the base of the heating unit and remove it carefully. Inside, the flame control assembly usually sits close to the main gas valve, connected by a slim metal tube. On some older models it’s tucked behind a protective shield, so a flashlight may help. If the diagram on the inside of the panel is still readable, it often marks the valve and ignition point with arrows, which saves time.

Before doing anything with the ignition system, shut off the main gas control and wait several minutes to clear any fumes. This pause prevents a sudden flare-up. Keep matches or a lighter away until that delay has passed. It’s also safer to avoid wearing loose sleeves or holding flammable items nearby. If there’s any smell of gas that lingers, step back and contact a technician instead of proceeding on your own. In Calgary, many people lean on service companies known for Review highlights about friendly and responsive staff, since personal safety always outweighs do-it-yourself attempts.

Some owners I’ve spoken with mentioned that identifying the correct knob on the valve assembly was trickier than expected. The selector usually has three positions: “off,” “on,” and “ignite.” Double-check the markings before turning anything. A small mistake here can waste fuel or, worse, create a hazard. That’s partly why others prefer professional inspections and Exploring what full-service furnace care actually means, rather than risking a rushed or uncertain approach.

Turning Off the Furnace and Preparing the Gas Valve

Switch the system control to the “off” position before touching any part of the assembly. Wait several minutes to let any built-up gas clear away. Skipping this pause can create an unsafe ignition later.

Locate the main knob on the gas valve, usually positioned near the base of the unit. Turn it gently until it sits at “off.” Do not force it–resistance may mean it is already in the right position. If unsure, double-check markings around the dial rather than guessing.

Checking the Area

Scan the compartment for lingering odours of gas. If the smell is noticeable, avoid striking a flame or pressing switches. Open nearby windows and step back until the scent has gone. Only return once the air feels fresh enough to breathe comfortably.

Positioning the Valve for Restart

Once conditions are safe, rotate the control from “off” to the “pilot” setting. This primes the assembly for the ignition step without allowing gas to flow freely. Hold the knob lightly in place; excessive pressure can wear the mechanism. At this stage, everything should be stable, waiting for the next action.

Lighting the Pilot with the Ignition Process

Hold down the control knob on the gas valve and switch it to the “ignite” setting. Keep pressing for about 30 seconds so the thermocouple has time to warm and register a steady flame. If the flame doesn’t stay, wait a minute, repeat once more, and avoid pressing too many times in quick succession to prevent gas buildup.

Some models come with a spark button. If present, press it while holding the knob in place. Without a spark button, a match or long lighter can be used, but keep the flame steady at the small opening where gas exits. Always face slightly away to avoid direct exposure to the initial flare.

Small Checks Before Closing the Panel

• Confirm the flame has a steady blue colour rather than yellow or flickering.
• Listen for a faint hissing; any irregular noise can signal debris or a partially blocked orifice.
• Release the knob slowly and make sure the flame continues to burn without interruption.

If the flame refuses to stay on after several tries, it could mean a worn thermocouple or blocked tubing. At that stage, consider Hoping it’s a simple fix, though who knows. For older units, Figuring out the cost to switch to something new might be more practical than repeated repairs. And if the whole situation feels uncertain, Checking out options for both repairs and new installations can give a clearer path forward.

Troubleshooting if the Pilot Light Does Not Stay Lit

Hold the control knob down for a longer count, usually thirty to forty seconds, before releasing. This extra time lets the thermocouple heat up enough to signal that the flame is steady.

If the flame still goes out, check the thermocouple itself. A bent sensor that sits too far from the flame or one covered in soot often fails to send the right signal. Cleaning the tip gently with fine sandpaper, or repositioning it closer to the flame, often resolves the problem. Replacement might be needed if it still refuses to respond.

A weak or flickering flame suggests a blockage in the gas orifice. Dust and rust fragments inside the assembly can disrupt the fuel flow. Carefully brushing the opening or using compressed air clears minor build-up without disassembling the unit.

If gas flow seems fine yet the flame won’t remain steady, the issue might point to a failing gas valve. At that stage, repairs can be more involved. Professional testing is recommended, as the valve directly controls the supply. See how Calgarians rate our furnace repairs before deciding whether to arrange service or replacement.

Sometimes the draft in a basement or utility room blows the flame out repeatedly. Closing windows nearby or adjusting venting paths reduces sudden airflow. It sounds small, but that simple step can prevent repeated re-ignitions.

Q&A:

Why won’t my furnace pilot light stay lit?

If your furnace pilot light keeps going out, it could be due to a dirty pilot tube, a faulty thermocouple, or issues with the gas supply. Start by turning off the furnace and cleaning the pilot assembly. If the thermocouple is bent or worn, replacing it may solve the problem. Ensure the gas valve is fully open and functioning correctly before attempting to relight.

Can I light the pilot light myself safely?

Yes, you can light the pilot light yourself if you follow proper precautions. Turn off the furnace and wait at least five minutes for any residual gas to clear. Use a long match or lighter and keep your face and body away from the flame path. Always follow the instructions in your furnace manual to avoid accidents.

What tools or materials do I need to relight the pilot?

You will need a long match or a utility lighter, a flashlight if the area is dark, and possibly a small screwdriver to access the pilot assembly cover. Some furnaces also have a built-in ignition button, which removes the need for matches. Keep a fire extinguisher nearby as an added precaution.

How do I know if the thermocouple is causing pilot light problems?

The thermocouple senses the flame and keeps the gas valve open. If the pilot light goes out after a few seconds or minutes, the thermocouple may be dirty, misaligned, or failing. Inspect it for soot buildup or signs of damage. Adjusting its position or replacing it often restores normal operation.

Is there a way to prevent my pilot light from going out frequently?

Regular maintenance helps keep the pilot light stable. Clean the pilot tube to remove dust and debris, check that the thermocouple is properly positioned, and confirm the gas pressure is consistent. Avoid drafts or airflow directly onto the pilot flame, as this can extinguish it. Periodic inspections reduce the likelihood of repeated outages.