Gas Grill Won't Light? Here's How to Fix It

Quick Diagnosis: Common Causes and Fixes

Fix 1: Check the Propane Tank

An empty or near-empty tank is the most common cause of a gas grill not lighting.

• Lift the tank – an empty 20lb tank weighs about 17lbs. A full one weighs around 37lbs.
• Shake it gently – you should hear liquid moving if there's gas remaining.
• Check the gauge if your tank has one.

If the tank is empty, replace or refill it before trying anything else.

Fix 2: Reset the Regulator

The propane regulator has a safety mechanism that trips when it detects a sudden pressure drop – this commonly happens when you open the tank valve too quickly. A tripped regulator reduces gas flow to almost nothing, causing a very weak flame or no ignition at all.

To reset the regulator:

1. Turn all burner knobs to OFF.
2. Turn the propane tank valve to OFF.
3. Disconnect the regulator from the tank.
4. Wait 30 seconds – this allows pressure to equalize.
5. Reconnect the regulator to the tank.
6. Open the tank valve slowly – turn it no more than a quarter turn at first.
7. Wait 30 seconds, then try lighting the grill normally.

Opening the tank valve slowly is the key step. A rapid pressure surge is what trips the regulator in the first place.

For a full walkthrough on regulator resets, see: 5 Easy Steps to Reset Your Grill Propane Regulator.

Fix 3: Check the Igniter

If you hear no click when pressing the igniter button, or the click produces no spark, the igniter is the problem.

Check the battery first

• Most electronic igniters use a AA or AAA battery in the igniter module.
• Locate the igniter module – usually mounted on the side of the grill near the control knobs.
• Replace the battery and try again.

Check for moisture or grease

• Grease or moisture on the igniter tip prevents sparking.
• Clean the tip with a dry cloth or cotton bud.
• If it's wet, let it dry completely.

Manual lighting as a fallback

If the igniter won't spark, light the grill manually:

1. Turn all burner knobs to OFF.
2. Open the grill lid fully.
3. Hold a long match or lighter to the burner port.
4. Turn on the burner closest to the flame source.
5. The burner should ignite immediately.

Never light manually with the lid closed – gas accumulation inside a closed grill is a fire and explosion risk.

Fix 4: Clear Clogged Burner Ports

Burner ports are the small holes along the burner tube that gas flows through. Spider webs, grease, and debris can block individual ports, causing uneven flame or no ignition on that burner.

1. Turn all burners off and disconnect the propane tank.
2. Remove the cooking grates and heat shields to access the burners.
3. Inspect the burner tubes – look for blockages in the ports (small holes along the tube).
4. Clear blocked ports using a stiff wire brush, a straightened paper clip, or a pin. Push debris out from inside the port, not further in.
5. Check the venturi tubes (the openings at the back of the burner where gas enters) for spider webs – this is a very common cause of blockages.
6. Reassemble and reconnect the propane tank, then try lighting again.

Do not use water to clean burner ports – moisture in the ports affects gas flow and can cause rust.

Fix 5: Check for Gas Leaks

If gas is escaping from a connection point, the grill may not build enough pressure to light – and it is a safety risk.

To check for leaks:

1. Mix dish soap with water to make a soapy solution.
2. Apply the solution to all connection points: the regulator-to-tank connection, the regulator-to-grill connection, and along the gas hose.
3. Open the tank valve slowly.
4. Watch for bubbles forming at any connection point – bubbles indicate a gas leak.
5. If you find a leak, turn off the tank immediately. Tighten the connection or replace the hose before using the grill.

Do not attempt to light the grill if you detect a gas leak.

When to Call for Service

Replace or service the grill if:

• The regulator continues to trip repeatedly after multiple resets
• You find a gas leak that cannot be fixed by tightening connections
• Burner tubes are cracked, rusted through, or have holes along the body (not just at ports)
• The gas hose is cracked, kinked, or shows visible damage

Nexgrill products include a manufacturer warranty. Check your product documentation or visit nexgrill.com/support for warranty and parts information.

Related Guides

• Grill Igniter Not Working – Causes and Fixes
• Gas Grill Troubleshooting Guide

Frequently Asked Questions

Why won't my gas grill light?

The most common causes are an empty propane tank, a tripped regulator, a faulty or flat igniter battery, clogged burner ports, or a closed tank valve. Work through each cause in order, starting with checking the tank level.

How do I reset the regulator on a gas grill?

Turn all burners off and close the tank valve. Disconnect the regulator from the tank and wait 30 seconds. Reconnect, then open the tank valve slowly – no more than a quarter turn at first. Wait 30 seconds before attempting to light the grill.

How do I manually light a gas grill?

Open the lid fully. Hold a long match or lighter next to the burner port. Turn on the nearest burner knob. The burner should light immediately. Never light a gas grill manually with the lid closed – gas accumulation creates a fire risk.

Why does my gas grill spark but not light?

If the igniter sparks but the grill doesn't light, gas is not reaching the burner. The most likely causes are a tripped regulator restricting gas flow, a closed tank valve, or clogged burner ports. Check the tank valve first, then reset the regulator.

How do I check for a gas leak on my grill?

Apply a soapy water solution to all connection points – the regulator-to-tank connection, the hose, and the grill inlet. Open the tank valve slowly. If bubbles form at any point, there is a gas leak at that connection. Turn off the tank immediately, and don't use the grill until you fix the leak.