Propane fireplace won't light or stay lit

Last updated October 22, 2026 · Reviewed by the Fireplace Helpline tech team

Is it the propane, or the fireplace?

If your other propane appliances (range, water heater, furnace) are also out or acting up, the problem is probably the supply: the tank, the regulator or the line. If only the fireplace is out, the problem is more likely in the fireplace itself. Our pilot won't light and pilot goes out guides cover those.

1. Check the tank gauge

Manufacturers list an empty propane tank as a cause of a pilot that sparks but won't light, and Valor's troubleshooting guide puts the tank's fuel level on its list of checks for low gas pressure. The propane industry's safety guide says to check the gauge on your tank periodically and to work out delivery timing with your supplier.

Reading the gauge is a safe homeowner check. Opening, closing or adjusting anything at the tank or regulator is not; leave that to your supplier.

2. If the tank ran empty, don't turn it back on yourself

This is the one most people get wrong. The Propane Education & Research Council says that if your tank runs out or service is interrupted, your propane retailer or a qualified professional should perform a leak check, restore gas service and, if needed, light your pilot lights. Call your supplier, tell them it ran out, and let them do it.

3. Just refilled and it still won't light?

After a run-out and refill, the line to the fireplace can hold air. Napoleon's manual lists "pilot supply line may contain air" as a cause of a pilot that sparks but won't light, and says to repeat the ignition process several times. Follow your model's lighting instructions, and if the control locks out, use the manual's reset steps and wait between tries rather than resetting over and over.

If your supplier restored service and the fireplace still won't light after a few proper tries, the cause is probably in the fireplace, and a tech can usually narrow it down on a video call.

4. Snow and ice on the tank or regulator

The propane industry's safety guide warns that snow and ice can damage system parts and cause a leak, and can block vents, raising carbon monoxide levels inside. It says to keep heavy snow and ice off propane piping, regulators and meters, and to clear snow carefully, with a broom rather than a shovel.

• Gently brushing loose snow off the regulator is fine.
• Don't chip, pry or hit ice off the regulator or its vent.
• If the regulator or its vent is iced over or blocked and you can't clear it gently, call your propane supplier.
• Check the fireplace's own vent cap on the outside wall or roof too. Manufacturers list a blocked or iced-over vent cap among the causes of a pilot that won't stay lit.

Lights, then goes out?

PERC lists running out of gas, too much or too little ventilation, and a problem with the appliance or propane system as reasons pilots go out. It says that if a pilot is hard to light or keeps going out, a qualified professional should look at it. For the fireplace side (thermocouples, flame sensors, pilot flame), see pilot lights, then goes out.

What a tech looks at on a video call

A tech will usually ask to see the pilot when you try to light it, the control or valve, the rating plate (to confirm it's set up for propane) and, if it's easy to show, the tank gauge. That's usually enough to tell a supply problem (one for your propane company) from a fireplace problem, and what to do next. If it needs hands-on work, we'll help you find a local pro.

If you smell gas

Propane has an odor added so you can smell a leak. Napoleon's manual notes that LP gas is heavier than air and can settle in low places. If you smell gas, get everyone out without lighting anything or using switches, phones or appliances. PERC says to call your propane retailer from a neighbor's house or somewhere else away from the leak, and to call 911 or the fire department if you can't reach the retailer. Don't go back in or use any propane appliance until the system has been checked and the retailer, an emergency responder or a qualified technician says it's safe.

Common questions

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