The first cold evening of fall arrives, you walk over to the gas fireplace, flip the switch — and nothing happens. No flame. No warmth. Just a cold firebox and the faint memory that it worked fine last spring.

For most Red Deer homeowners, the gas fireplace pilot light is the component they interact with once a year and understand the least. It is a small flame with a big job: igniting the main burner, powering the safety sensors, and keeping the fireplace ready to produce heat at a moment's notice during a Central Alberta winter.

This guide covers everything you need to know about your gas fireplace pilot light — how it works, how to restart it, whether to leave it on, how much gas it uses, what to do when it will not stay lit, and when to call a licensed gas fitter instead of troubleshooting further.

How Does a Gas Fireplace Pilot Light Work?

A pilot light is a small, continuous gas flame located inside the fireplace near the main burner. It serves three purposes:

1. Ignites the main burner. When you flip the wall switch, press the remote, or turn the gas valve to the "on" position, the pilot light ignites the main burner gas flow. Without the pilot, the gas has no ignition source.

2. Powers the thermocouple. The thermocouple is a safety sensor that sits in the pilot flame. When heated, it generates a small electrical current (25-35 millivolts) that signals the gas valve to stay open. If the pilot goes out, the thermocouple cools, the current stops, and the gas valve closes automatically — preventing unburned gas from filling the firebox.

3. Powers the thermopile. The thermopile is a larger version of the thermocouple that generates enough current (300-900 millivolts) to operate the gas valve solenoid, the wall switch circuit, and the remote receiver. It is the power source for the fireplace's control system — no external electricity required for most standing-pilot models.

Understanding these three jobs helps you diagnose problems: if the pilot is working but the fireplace will not turn on, the issue is the thermopile or the switch. If the pilot will not stay lit, the issue is the thermocouple. If the pilot will not light at all, the issue is the igniter or the gas supply.

How to Restart the Pilot Light on Your Gas Fireplace

If your pilot light has gone out — whether you turned it off for summer, it was extinguished by a draft, or the gas supply was briefly interrupted — here is how to relight it safely:

Step 1: Locate the gas control valve. Open the lower access panel on the front of the fireplace (below the glass). The gas control valve is a box-shaped component with a knob that has three positions: OFF, PILOT, and ON.

Step 2: Turn the knob to OFF and wait 5 minutes. This allows any residual gas in the firebox to dissipate. Do not skip this step. If you smell gas strongly after 5 minutes, do not proceed — leave the house and call your gas utility or a licensed gas fitter.

Step 3: Turn the knob to PILOT and press it in. Pressing the knob opens the pilot gas line manually. Hold it firmly — you need to keep it pressed for the next step.

Step 4: Light the pilot. While holding the knob in, press the piezo igniter button (a red or black button on or near the valve) repeatedly until the pilot catches. If your fireplace does not have a piezo igniter, hold a long-reach lighter to the pilot tube opening while pressing the knob.

Step 5: Hold the knob for 30-60 seconds. After the pilot lights, keep the knob pressed for 30 to 60 seconds. This heats the thermocouple enough to generate the current that holds the gas valve open independently.

Step 6: Release and turn to ON. Slowly release the knob. If the pilot stays lit, turn the knob from PILOT to ON. The fireplace is now ready to operate from the wall switch or remote.

If the pilot goes out when you release the knob: The thermocouple is not generating enough current — it has likely failed. Repeat the process once. If the pilot will not stay lit after two attempts, the thermocouple needs professional replacement. Call Plumbing Experts Red Deer for gas fireplace repair.

Should You Leave the Pilot Light On or Turn It Off?

This is the most-asked question about gas fireplace pilot lights in Red Deer. The answer depends on the season.

During heating season (October through April): Leave it on.

In Central Alberta, your gas fireplace is a heating source — not a decoration. Leaving the pilot on during winter provides three benefits:

• Instant heat. The fireplace lights immediately when you flip the switch. No relighting procedure, no waiting.
• Moisture prevention. A burning pilot keeps the firebox and vent pipe warm, preventing condensation buildup inside the venting system. In Red Deer's cold, humid winters, condensation inside the vent can corrode metal components and cause rust damage.
• Reliability. A pilot that has been running continuously is a pilot you know works. Turning it off and on repeatedly increases the chance of encountering a relighting issue when you need heat most.

During summer (May through September): Your choice.

Turning off the pilot during months you do not use the fireplace saves a small amount on your gas bill and eliminates the minor heat output the pilot produces. The savings are modest — but in a warm house during July, even a small flame adds unwanted heat.

The Red Deer recommendation: Leave it on from October through April. Turn it off from May through September if you prefer. When you relight in fall, allow a few minutes for air to purge from the gas line before the pilot catches — this is normal after a summer shutdown.

Does a Pilot Light Use a Lot of Gas?

A standing pilot light on a residential gas fireplace consumes a small, continuous amount of natural gas — typically in the range of 600 to 1,000 BTU per hour, depending on the model.

What that means on your gas bill: At current Alberta natural gas rates, running a standing pilot continuously costs roughly $8 to $15 per month. Over a full year, that is approximately $100 to $180. During the 7 months of Red Deer's heating season when you want the fireplace available, the cost is roughly $55 to $105.

Context matters. Your furnace consumes 40,000 to 100,000 BTU per hour when running. A pilot light at 600-1,000 BTU per hour is a fraction of your total gas consumption — less than 2% of a typical Red Deer household's winter gas bill. The convenience of instant heat and the protection against vent condensation are worth more than the modest gas cost for most homeowners.

Electronic ignition eliminates this cost. Newer gas fireplaces use electronic ignition (intermittent pilot or hot surface ignition) that only consumes gas when the fireplace is actively running. If pilot gas cost is a concern and you are considering a fireplace upgrade, electronic ignition models are worth evaluating.

What Happens If the Pilot Light Goes Out on Your Gas Fireplace?

The short answer: nothing dangerous — if the fireplace is working correctly.

The safety system works like this: When the pilot goes out, the thermocouple cools down and stops generating current. Within 30 to 90 seconds, the gas valve closes automatically, shutting off all gas flow to both the pilot and the main burner. No gas accumulates in the firebox. No gas leaks into your home. This is exactly what the thermocouple is designed to do.

When the safety system might NOT work: If the thermocouple has degraded but not fully failed, it may hold the gas valve partially open even without a pilot flame — allowing a small amount of gas to escape. This is rare but is the reason gas fireplace maintenance matters. Annual inspection and testing by a licensed gas fitter verifies the thermocouple is responding correctly and the gas valve seals completely when the pilot is out.

If you smell gas with no pilot lit: Do not attempt to relight. Turn off the gas at the manual shutoff valve behind the fireplace. Open windows. Leave the house. Call your gas utility emergency line or a licensed gas fitter in Red Deer immediately.

Can You Have a Gas Fireplace Without a Pilot Light?

Yes. Modern gas fireplaces increasingly use electronic ignition systems instead of standing pilot lights:

Intermittent pilot ignition (IPI). The fireplace generates a pilot flame electronically only when called to turn on. The pilot lights, heats the thermocouple/thermopile, and then the main burner ignites. When the fireplace is turned off, the pilot extinguishes. No standing flame. No continuous gas consumption.

Hot surface ignition (HSI). A glowing element — similar to an electric oven igniter — directly ignites the main burner without a pilot flame at all. These systems require a 120V electrical connection to the fireplace.

The tradeoff: Electronic ignition eliminates standing pilot gas cost but adds electronic components that can fail — igniters, control modules, wiring connections. It also means the fireplace does not work during a power outage unless a battery backup is installed. Standing pilot models work with zero electricity — a significant advantage during Central Alberta winter power outages.

When to Stop Troubleshooting and Call a Gas Fitter

Some pilot light issues are simple to resolve — relighting after summer shutdown, replacing remote batteries, or opening a closed shutoff valve. Others require a licensed gas fitter. Here is the line:

You can handle:

• Relighting the pilot after summer or after a brief gas interruption (follow the steps in Section 3)
• Replacing batteries in the wall switch or remote control
• Checking that the manual shutoff valve behind the fireplace is in the open position
• Verifying that the thermostat or wall switch is set correctly

Call a professional when:

• The pilot will not stay lit after two relighting attempts (thermocouple failure)
• The pilot lights but the main burner does not ignite (thermopile, gas valve, or wiring issue)
• You smell gas with no flame present (potential gas valve leak — leave the house first)
• The pilot flame is yellow or orange instead of blue (combustion issue — carbon monoxide risk)
• The fireplace produces soot or a burning smell after the initial seasonal use (needs professional cleaning)
• Any unusual noise from the gas valve area (clicking, hissing, or buzzing)

Garrett, our gas appliance specialist at Plumbing Experts Red Deer, diagnoses and repairs all gas fireplace pilot and valve problems. Schedule a gas fireplace service call.

Why Pilot Light Care Matters More in Red Deer

Gas fireplaces in Red Deer are not decorative luxuries — they are functional heating appliances that many households depend on during the coldest months. A few Central Alberta-specific factors make pilot light maintenance more important here than in milder climates:

Power outages during winter storms. A standing-pilot gas fireplace works with no electricity. During a winter power outage in Red Deer — which can last hours or even days during severe storms — a gas fireplace with a working pilot may be your only heat source. Knowing your pilot is reliable before the outage starts is critical.

Extended heating season. Red Deer's heating season runs October through April — 7 months. A pilot light that runs reliably for 7 straight months needs a healthy thermocouple, a clean pilot tube, and proper gas pressure. Annual inspection catches problems before the season starts.

Fall relighting after summer shutdown. Every September and October, Red Deer homeowners relight their gas fireplaces for the season. Knowing the correct relighting procedure (Section 3) prevents unnecessary service calls — and knowing when to call a professional prevents unsafe troubleshooting.