The sequence is: lid open, cylinder valve open slowly, wait half a minute, knob to high, press the igniter from the side, then turn it down. That is the whole job, and the two steps people skip are the two that cause the trouble — opening the lid before any gas flows, and opening the cylinder valve slowly rather than cranking it.
If you only remember one thing from this page, remember the regulator. The regulator on a 20-pound propane cylinder contains an excess-flow device that is designed to cut the gas down to a trickle if it detects a sudden rush — the sort of rush a leaking hose would produce, and also the sort a fast turn of the valve produces. Once it has tripped, the pit will click and click and never light, and nothing is actually broken. Close the burner knob, close the cylinder valve, wait a minute, then open the cylinder valve slowly and all the way. This one mechanism is behind more “faulty” fire pits than every other cause combined.
Before the first fire of the season
Five minutes, once a year, and it prevents almost every problem on this page.
- Look at the hose. Cracks, hard spots, stiffness, cuts or rodent damage mean replace it, not tape it. A hose that has spent three winters in the weather is a consumable.
- Soapy-water test the joints. Cylinder valve open, burner off, soapy water brushed on every connection. Bubbles mean a leak. Tighten by hand and retest. Never use a flame to find a gas leak.
- Clear the burner ports. Spiders genuinely like burner tubes, and a blocked port next to the electrode is the difference between lighting and clicking. A soft brush is all it takes.
- Make sure the media is dry. Lava rock and fire glass hold water, and trapped moisture turns to steam under a flame and can pop a stone out of the bowl. Let it dry before a first burn after rain.
- Check the igniter. Many have a replaceable battery behind the knob, usually an AA or a button cell. A faint or absent click is normally a flat battery or a corroded electrode, not a dead pit.
Troubleshooting, by symptom
It clicks but will not light. The spark is there and the gas is not. Work in this order: reset the regulator by closing and slowly reopening the cylinder valve; check the cylinder is not empty by weight rather than by guess; clear the burner ports nearest the electrode.
No click at all. Battery, then electrode. Replace the battery first because it is free to try, and look for white corrosion or a bent electrode in the burner pan. On a built-in pit, a complete spark ignition assembly is a replaceable part rather than a reason to rebuild the feature.
It lights, then goes out after a few seconds. Usually the regulator in its limited-flow state, or a nearly empty cylinder that cannot keep up once the burner demands full flow. On a cold night, a cylinder that has chilled down produces less vapor and can do the same thing, which is physics rather than a fault.
The flame is yellow, lazy or sooty. Not enough air, or something blocking the burner. Common causes are fire glass or lava rock heaped over the burner instead of arranged around it, blocked ports, or the wrong regulator. A correctly burning propane flame is blue at its base.
It smells of gas and will not light.Stop. Shut the cylinder valve, step back and let the area clear completely before doing anything else, then leak-test before another attempt. Propane is heavier than air and collects in the bowl and at ground level, so “it will blow away” is not a safe assumption.
Natural gas pits light the same way, with one difference
There is no cylinder valve and no regulator to trip, so the sequence shortens to: lid open, gas valve on at the wall or the key valve, knob to high, igniter, turn it down. What natural gas adds is that the supply never runs out mid-evening, and what it takes away is portability — the pit lives where the plumber put the line. If you are still choosing between the two fuels, natural gas vs propane fire pit runs that decision properly, including the BTU and install differences.
Two habits for the end of the evening
Close the cylinder valve, not just the knob. The burner knob stops the flame; the cylinder valve stops gas sitting in the hose until next time. Doing both is the cheapest safety measure available.
Let it cool before you cover it.A cover trapped over a hot bowl melts, and a damp cover put straight onto warm steel holds moisture against the metal — which is how a pit that was fine in October is rusty in March. Our fire pit covers page covers what a waterproof rating actually means, and are propane fire pits safe has the full storage rules for spare cylinders.