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Patio Heaters · Troubleshooting

Patio Heater Not Igniting: 6 Causes and Fixes

Everything you need to know about patio heater not igniting: 6 causes and fixes, explained plainly.

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How to fix it

Work through these in order, the most common causes come first.

  1. Start With the Basics

    Tank valve and fuel level: Confirm the tank valve is fully open and the tank isn't empty. A weak, dying flame right after lighting often points to a low tank rather than an ignition fault. Hose connection: A loose regulator hose restricts gas flow enough to prevent reliable ignition, even with a full tank.

  2. Diagnosing Your Specific Problem

    Igniter clicks, no flame at all: likely a gas flow issue, not the igniter. Check the tank valve, hose connection, and burner ports for blockage. No clicking sound when pressing the ignition button: the piezo igniter itself has likely failed and needs replacement, a relatively inexpensive and often user-replaceable part.

  3. See Also

    Patio Heater Blowing Out in Wind, for flame stability once it's lit Patio Heater Not Producing Enough Heat, for output problems after it's lit Patio Heaters Buying Guide, for choosing a reliable model

Start With the Basics

Tank valve and fuel level: Confirm the tank valve is fully open and the tank isn't empty.

A weak, dying flame right after lighting often points to a low tank rather than an ignition fault.

Hose connection: A loose regulator hose restricts gas flow enough to prevent reliable ignition, even with a full tank.

New tank or hose air: A freshly connected tank or hose usually has air in the line.

Several ignition attempts a few seconds apart typically clears it.

Diagnosing Your Specific Problem

Igniter clicks, no flame at all: likely a gas flow issue, not the igniter.

Check the tank valve, hose connection, and burner ports for blockage.

No clicking sound when pressing the ignition button: the piezo igniter itself has likely failed and needs replacement, a relatively inexpensive and often user-replaceable part.

Heater lights, then goes out after releasing the button: almost always a thermocouple issue.

Hold the button for the full recommended time, usually 30 seconds, and clean or reposition the thermocouple if the problem persists.

See Also

Patio Heater Blowing Out in Wind, for flame stability once it's lit Patio Heater Not Producing Enough Heat, for output problems after it's lit Patio Heaters Buying Guide, for choosing a reliable model How to Choose a Patio Heater, the full decision framework

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Answers

Frequently asked questions

Why does my patio heater click but not light?

A clicking sound with no flame almost always means the piezo igniter is sparking correctly but the gas isn't reaching the burner, or it's not reaching it in the right amount. Check that the propane tank valve is fully open, the tank isn't empty, and the regulator hose is properly connected before assuming the igniter itself has failed.

Why does my patio heater light and then immediately go out?

This is typically a thermocouple issue. The thermocouple is a safety sensor that shuts off gas flow if it doesn't detect a flame, and if it's dirty, misaligned, or worn out, it can cut gas flow even when the burner is lit correctly. Holding the ignition button down for a full 30 seconds after lighting, per the manufacturer's instructions, gives the thermocouple time to heat up and register the flame.

Is it safe to keep trying to light a heater that won't ignite?

A few attempts are normal and safe. If it repeatedly fails to light after several tries, stop and let any accumulated gas clear for a few minutes before trying again, and never attempt to light it near an open gas smell, which indicates a leak that needs to be addressed before any ignition attempt.

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