A DCS gas burner that won’t light depends on the ignition type. Check whether the pilot is lit on older standing-pilot models, and look at the cap, electrode and ports on spark-ignition models. If you smell gas at any point, stop and leave the house instead of troubleshooting.
What should you do first?
A burner that won’t light can trace back to a few different points along the path gas travels from the supply line to the flame. Working through them in order is usually the fastest way to a real fix, and better than replacing the most obvious-looking part first.
If you smell gas at any point, stop. Do not use any switch or flame, leave the house, call your gas utility or 911 from outside, and treat it as a job for a licensed professional.
Keep the area around the burner clear while you check. Remove pots, towels and anything else that could catch fire, and keep children and pets out of the kitchen until you are done.
What if the range has a standing pilot?
On older RG and RGS-era ranges with a standing pilot, a burner that won’t light usually means the pilot has gone out. Look for the small, constant flame near the burner.
If it is out, relight it following the range’s own instructions, usually on a label inside the range or in the original manual, and only if you smell no gas. If it won’t stay lit after relighting, the thermocouple that senses the pilot flame and keeps gas flowing to it has likely failed.
Never use a match or lighter on a spark-ignition range as a workaround without understanding why the igniter is failing, and never relight a pilot when there is gas in the air.
What if the range uses spark ignition?
On later RGV and RDT ranges with electronic spark ignition, a burner that won’t light while you can hear or see the igniter clicking points at the usual causes for any spark-ignited gas burner. These are a dirty or misaligned electrode, a cap that isn’t seated flush, or debris in the burner ports.
If the igniter does not click or spark at all, an electrical or module problem is more likely than anything at the burner.
Why is the flame weak even when it lights?
A burner that lights but burns noticeably weaker than the others points at its orifice, the small, precisely sized opening that meters gas into the burner, being partly blocked. It can also mean a regulator is not delivering full pressure to that section of the manifold.
If every burner on the range runs weak, the regulator or the home’s gas supply is the more likely shared cause.
Can cold weather make it worse?
A borderline burner, slower than it should be to catch or needing two or three clicks where one used to do, often gets worse on cold mornings. Cold air is denser and slightly changes the air-to-gas ratio reaching the burner.
If a burner is fine most of the time but gives trouble first thing on cold mornings, report it as an ignition problem. Cold weather is usually just making an existing issue more obvious.
What if several burners act up together?
If two or more burners are weak or slow to light around the same time, the shared timing points toward the regulator or the gas supply pressure, not several separate problems at once. Tell the technician whether it affects one burner or several.
If basic checks do not resolve it, or you are not comfortable working around an open gas burner, stop testing there.
A short written list helps: which burners, how long, and whether it changes with weather or time of day. That list shortens the visit and makes the diagnosis more accurate.
| Sign | Likely cause | What you can check | When to call |
|---|---|---|---|
| Burner dead, pilot out (older RG or RGS) | Pilot extinguished or failed thermocouple | Look for the pilot flame, relight per the range’s instructions if no gas smell | If it will not stay lit |
| Clicking but no flame (RGV or RDT) | Dirty electrode, crooked cap or blocked ports | Reseat the cap and look at the ports | If it still does not light |
| No click at all | Module or electrical problem | Listen for the igniter on each burner | Yes |
| One burner weak | Partly blocked orifice | Compare its flame to the others | If cleaning the ports does not help |
| Several burners weak | Regulator or gas supply pressure | Note whether all are affected | Yes |
Frequently asked questions
Why does my burner click but not light?
The igniter is working but the spark is not lighting the gas. Usual causes are a dirty or misaligned electrode, a cap that isn’t seated flush, or debris in the ports. Reseat the cap and check the ports first.
Why does my burner light worse on cold mornings?
Cold air is denser and slightly changes the air-to-gas ratio at the burner, which can expose a borderline ignition problem. It usually means the issue already exists and the cold only makes it easier to notice.
How do I know if the problem is the regulator?
If several burners are weak or slow together, the regulator or the home’s gas supply is the more likely shared cause. A single weak burner points toward its own orifice instead. A technician can confirm with a pressure test.