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Solid gas flame at the burner of a Cal-o-Rex glass lined LP gas water heater in Pozos, Guanajuato, Mexico. The flame dispersing cone is damaged. (C) Daniel Friedman (2015) Gas Burner Popping Noises
Gas Appliance / Heater / Burner Popping Diagnosis, Cause, Cure

Gas burner or gas appliance popping noises:

Here we describe the most-common causes of popping noises or sounds at gas burners found on stoves, range tops, ovens, gas fired heaters, boilers, or water heaters, and we suggest how to fix the popping sound.

We point out that some of these gas burner popping sounds are signs of a dangerous condition.

This article series provides descriptions of the cause & cure of unsafe gas burners, appliances, regulators, heaters, gas piping, & other indications of unsafe or improperly operating gas appliances, gas meters, and other gas installation defects are provided.

InspectAPedia tolerates no conflicts of interest. We have no relationship with advertisers, products, or services discussed at this website.

- Daniel Friedman, Publisher/Editor/Author - See WHO ARE WE?

Cause & Cure for Popping Noise at Gas Burners

 Popping sound from gas burner when ignited is unsafe but may be easy to fix (C) InspectApedia.com BH Watch out: most of these LP gas , propane, or natural gas burner conditions are potentially very dangerous and needs prompt attention. You should turn off the fuel supply to any gas appliance expected of leaking - to reduce the risk of a catastrophic gas explosion.

Then have your utility company or service person check the appliance immediately.

[Click to enlarge any image]

Top 16 Causes of Popping Sound at Gas Burners on Appliances or Heaters

These causes of popping gas burners are given roughly in the order of probability

  1. Burner cap is askew -

    check this first, but don't get burned: don't touch a hot burner cap. Let the burner cap cool off first.

    details are at GAS BURNER CAP NOT SEATED
  2. Wet gas range top burners or burner cap

    did you recently clean the stovetop? Did a liquid boil over on the burner?

    Lift off, inspect, and dry the burner caps and other lift-off burner parts.

    Rarely, there may be water in the gas piping from condensation or from a bad gas delivery;

    If your burner assembly contains parts that can be simply lifted off for inspection and cleaning (the grate, the burner cap, and on many stovetops, the burner base) lift off, clean, and dry each part in succession.

    Be thorough in your inspection for spills into the cooktop. Spills of water or any cooking liquid that leak down into the cooktop assembly may wet the igniter wires or other components leading to igniter malfunction, clicking, sparking, or failure to spark.

    See also IGNITER CLICKING DIAGNOSIS
  1. Dirty or blocked gas burner orifices

    in part or all of the burner or burner ring.

    Use a soft brush like a toothbrush or a toothpick to clean out any dried grease or food that is clogging the orifices or gaps that regulate the flame at the burner.

    Watch out: never use a metal tool that can break, gouge, or enlarge the burner gaps or orifices.

Spots to clean on a stovetop gas burner that is not working properly (C) Daniel Friedman at InspectApedia.com

  1. Damaged igniter

    or igniter wire or food or other debris fouling the igniter causing it to shut off early.

Roaring gas burner flame, flame lifting off of the burner - over-pressure (C) Daniel Friedman at InspectApedia.com

  1. Dirty pilot flame orifice or tube

    older gas appliances including the cooktop shown below may use a standing pilot light rather than an igniter to light the gas burners on your stove.

    On occasion you may trace a popping noise (or other gas burner lighting troubles to a clogged or dirty orifice not at the gas burner itself but at the pilot.

    Below: a properly-functioning standing pilot on a gas stove in a cabin at Bearskin Lodge, in northern Minnesota.

Standing pilot light or flame on a gas stove, Bearskin Lodge, Minnesota (C) Daniel Friedman at Inspectapedia.com

  1. Improper air mix

    supplying combustion air to the burner

    Check the air mix for the individual burner that's popping. Try first opening the air shutter just a tiny bit more (perhaps 1/16" to 1/8" wider opening) to give a bit more combustion air and note if this makes the popping better or worse.

    Flame should be blue. If the air supply is too little (mixture is too rich) the flame will be weak or blow out.

    If the air supply is too much the flame will be yellow.

    See details at FLAME COLOR, BLUE vs YELLOW COMBUSTION

    The air shutter on a gas range or most gas cooktops and on grilles is located at the end of the air tube closest to the control knob for the burner. Usually there is a set screw that must be loosened to permit turning the air shutter more-open or more-closed. Remember to re-tighten the screw after each adjustment.

    The air shutter on a gas burner in a heating furnace or boiler is located at the end of the burner tube closest to the supply manifold
  2. Thermal expansion of metal parts

    occurs in gas ovens as the oven heats up, may be normal.

    Thermal expansion-caused gas appliance popping - if due to thermal expansion - will usually occur as a single popping noise occurring once during heat-up or during cool-down when the stovetop or heater is turned off. .
  3. Flashback extinction pop

    occurs at the time a burner is turned off or 2-3 seconds later, typically caused by a combination of hot burner components and left-over gas fuel in the supply to the burner.

    This is normal on some appliances such as by Maytag & Subzero-Wolf and is usually but not always safe.

    Check the adjustment of air supply to the burner.

    Watch out: for loss of pilot flame at gas burners that lose a pilot. Extinction popping or flashover popping can blow out a nearby pilot.
  4. Delayed gas ignition

    at a gas burner - if popping or a small gas explosion occurs once after the burner has been turned on.

    Watch out: this condition can be unsafe

    Check for improper gas type (LP vs Natural gas)

    Check for a bad gas igniter or igniter wire or igniter control element
  5. Cracked gas burner cap or burner ring

    inspect closely for damage and replace if damage is found
  6. Leak in gas connections

    at burner - watch for flame roll-out
  7. Contaminants in the gas supply

    if at all burners all the time
  8. Abnormally-low gas flame

    if at all burners every time - check the gas regulator and the regulator vent
  9. Blocked gas injector nipple

    in the appliance - unscrew, clean, replace, taking care not to cross-thread and damage the (usually brass) fitting
  10. Damaged gasket or packing

    check for damaged, lost, askew packing used at some gas burners
  11. Water heater popping noise

    at gas-fired water heater may be due to scale on the bottom of the water heater tank.

    See details at WATER HEATER SCALE DE-LIMING PROCEDURE

Photograph of rusty gas burner

Other common noises at gas burners

Question: My gas stove is currently making popping sounds

Popping noisy gas burner (C) INspectApedia.com reader2019/03/25 Anonymous said

Dear helpful personnels at inspectapedia.

My stove is currently making popping sounds.

I suspect that its because the burner cap is not flat.

That in turn causes air to flow resulting in the popping sound. I have no experience whatsoever hence would like to ask for your opinion before I actually purchase a replacement burner cap.

Kindly advice.
Im attaching a video and some diagrams to ensure you are able to understand what I mean. Kindly assist me.

Reply:

If there are other burners on your stove that are the same size as the popping one, just swap over the burner and burner cap from one of those.

If the popping noise continues then the problem isn't the burner cap.

Check also that the burner ring and cap parts are properly-seated on the stove. It's easy to set one askew leading to improper burner operation.

 Popping sound from gas burner when ignited is unsafe but may be easy to fix (C) InspectApedia.com BH

Reader Follow-up:

... thanks a lot for taking the time to reply to my query. Unfortunately I do not have any burner caps that matches the size of the faulty one. Guess that would mean I need to get someone onsite.

Grateful for your response though.

Reply:

I suggest a more-careful look at the seating and also for blockage of any gas openings and perhaps for a gas leak as well as checking the causes listed

at GAS BURNER POPPING NOISES before ordering the new part.

On 2017-01-10 by Pat merrick

Had a popping sound coming from a bran new log set in a new home on propane.

We eliminated everything in the line from 500 gallon propane tank to LP log set and finally hooked directly to tank and still have the same popping.

What's in the propane that's causing it ? Air ?

Burned the log set at 3 different location besides this home and it burned perfect. What's up

On 2017-01-10 by (mod) popping sound coming from a new log set on propane

I don't know, Pat and I worry that it's unsafe. Perhaps something has become disturbed, broken, damaged, clogged (I've found spiders inside burners) as you've moved this gas log set four times, now.

Check the air shutter adjustment for the burner too.

Gas Burner Flame Uneven, Yellow, Askew, Noisy

When a gas burner cap is askew the burner may fail to ignite at all - the cap is perhaps shorting the igniter, or the flame will be lopsided - and dangerous, as shown in my photos below.

Gas burner cap is crooked on the burner base, causing failure of the gas igniter or a lopsided and dangerous flame (C) Daniel Friedman at InspectApedia.com

Above: on a Mabe gas range installed in San Miguel de Allende, Guanajuato, we show a burner cap slightly askew, off its base. Below you can see what that does to the gas flame.

Gas burner cap is crooked on the burner base, causing failure of the gas igniter or a lopsided and dangerous flame (C) Daniel Friedman at InspectApedia.com

Below I show the proper gas flame after the burner cap was re-seated. Fixing this takes just seconds but

Watch out: about touching a hot burner cap. You can get a nasty burn.

Proper flame on a Mabe gas cooktop when the burner cap is properly in place (C) Daniel Friedman at InspectApedia.com

If the range or cooktop gas burner flame is not even or is yellow in some areas check for

If the gas flame is very noisy and too strong and lifts off of the burner check for


...

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