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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.
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Cause & Cure for Popping Noise at Gas Burners
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
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.
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.
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.
Damaged igniter
or igniter wire or food or other debris fouling the igniter causing it to shut off early.
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.
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.
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
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. .
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.
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
Cracked gas burner cap or burner ring
inspect closely for damage and replace if damage is found
Leak in gas connections
at burner - watch for flame roll-out
Contaminants in the gas supply
if at all burners all the time
Abnormally-low gas flame
if at all burners every time - check the gas regulator and the regulator vent
Blocked gas injector nipple
in the appliance - unscrew, clean, replace, taking care not to cross-thread and damage the (usually brass) fitting
Damaged gasket or packing
check for damaged, lost, askew packing used at some gas burners
Water heater popping noise
at gas-fired water heater may be due to scale on the bottom of the water heater tank.
Question: My gas stove is currently making popping sounds
2019/03/25 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.
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
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.
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.
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.
If the range or cooktop gas burner flame is not even or is yellow in some areas check for
Clogged burner ports
Air shutter at the burner control is improperly-set
Wrong gas fuel type (you're using natural gas on an appliance set up for propane, or you're using propane on an appliance set up for natural gas) - Watch out: this is unsafe and risks fire or explosion
If the gas flame is very noisy and too strong and lifts off of the burner check for
Burner cap askew - as in our photo shown earlier
Gas regulator improperly set - wrong gas pressure
Wrong gas fuel type (you're using natural gas on an appliance set up for propane, or you're using propane on an appliance set up for natural gas) - Watch out: this is unsafe and risks fire or explosion
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In addition to any citations in the article above, a full list is available on request.
Bosch, "Gas Cooktops Installation Manual, NGM Gas Cooktops (NGM30, NGM50, NGM 56, NGM80, NGM86, NGMP65)", (2013), Bosch, 1901 Main St., Suite 600, Irvine CA 92614, Tel: 800-944-2904, Website: www.bosch-home.com
Bosch, "LP Gas Conversion Kit Installation Manual , NGM Gas Cooktops (NGM30, NGM50, NGM 56, NGM80, NGM86, NGMP65)", (2014), Bosch, 1901 Main St., Suite 600, Irvine CA 92614, Tel: 800-944-2904, Website: www.bosch-home.com
Bosch, "Gas Cooktops Use and Care Manual, NGM5055, NGM8055, NGM8065, NGMPO55, NGM5655, NGM8655, NGM8665, NGMP655", (11/13), Bosch, 1901 Main St., Suite 600, Irvine CA 92614, Tel: 800-944-2904, Website: www.bosch-home.com
U.S. Energy Information Administration - eia.doe.gov/
U.S. Environmental Protection Agency - epa.gov/solar/energy-and-you/affect/natural-gas.html
At Natural Gas.Org www.naturalgas.org/environment/naturalgas.asp#emission you’ll find a table of combustion products
At geocities.com/rainforest/6847/report1.html is an interesting and detailed though not “neutral” report on the components and contaminants in the combustion of natural gas. You’ll see a long long list of emissions products, but look again – most of the contaminant levels listed are in the picograms.
apvgn.pt/documentacao/iangv_rep_part1.pdf lists the components in natural gas exhaust from vehicles
The Need Project, Manassas, VA: need.org/needpdf/infobook_activities/SecInfo/NGasS.pdf
Kroschwitz, Jacqueline I., and Mary Howe-Grant (eds.). "Gas, Natural." In Encyclopedia of Chemical Technology. 4th ed., vol. 12. New York: John Wiley and Sons, Inc., 1993.
Tussing, Arlon R., & Bob Tippee. The Natural Gas Industry: Evolution, Structure, and Economics. 2nd ed. Tulsa, OK: PennWell Publishing, 1995.
HOT WATER HEATERS - a detailed guide to all types of hot water sources, problems, inspection, repair
SEWER GAS ODORS in COLD / WET WEATHER - Septic Odors or Sewage Odor Diagnosis & Repair Guide for diagnosing and eliminating cold weather sewer gas odors
Water Pressure Loss - Diagnosis how to determine why water pressure has been lost or why there is no water at all in a building
In addition to citations & references found in this article, see the research citations given at the end of the related articles found at our suggested
Carson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. Tel: (416) 964-9415 1-800-268-7070 Email: info@carsondunlop.com. Alan Carson is a past president of ASHI, the American Society of Home Inspectors.
Carson Dunlop Associates provides extensive home inspection education and report writing material. In gratitude we provide links to tsome Carson Dunlop Associates products and services.