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.

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

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

3. 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.

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

5. 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.

6. 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
7. 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. .
8. 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.
9. 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
10. Cracked gas burner cap or burner ring
    
    inspect closely for damage and replace if damage is found
11. Leak in gas connections
    
    at burner - watch for flame roll-out
12. Contaminants in the gas supply
    
    if at all burners all the time
13. Abnormally-low gas flame
    
    if at all burners every time - check the gas regulator and the regulator vent
14. Blocked gas injector nipple
    
    in the appliance - unscrew, clean, replace, taking care not to cross-thread and damage the (usually brass) fitting
15. Damaged gasket or packing
    
    check for damaged, lost, askew packing used at some gas burners
16. 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

Other common noises at gas burners

• Clicking
  
  at the burner / igniter
  
  
  - see GAS IGNITER DIAGNOSIS & REPAIR
  
  - and GAS COOKTOP or STOVE IGNITER REPAIR
• Rumbling roaring gas flame with flame lifting off the burner - gas supply pressure is too high; check gas regulators in the system
  
  - see GAS REGULATORS & APPLIANCE / HEATER CONTROLS
  
  - and LPG & PROPANE APPLIANCE PRESSURES
  
  - and NATURAL GAS APPLIANCE PRESSURES

What's the repair for a gas stove 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

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

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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Reader Q&A - also see RECOMMENDED ARTICLES & FAQs

What is normal vs abnormally loud noise from a gas boiler?

Hi, Is quite loud noise to be expected from the flame in a forced water heat boiler/furnace?

Does an industrial water heater make noise? On 2021-03-01 by Anonymous

by (mod) - "loud" can be subjective, so start with some basic safety checks and also, identify the actual sound source

@Anonymous,

I wish I could be more helpful, but as we know, one person's "quite loud" is another person's "normal" so from text and without any measurement or characterization of gas heater noise, I can't say if your gas fired heating boiler and water heater are working properly or not.

Some burner noise is normal;

Yours is a hot water or hydronic boiler; the circulators and relays are usually pretty quiet but can also be noisy and may indicate trouble.

Power venters also make extra fan noise.

So where to start?

Watch out: Safety!

Be sure that you have working CO (Carbon Monoxide) and Smoke Detectors properly located and tested in your home - that affords a bit of safety margin while we worry about heater inspection and maintenance.

Of if you hear or see anything that makes you believe the equipment is unsafe, err in the direction of caution by shutting it off.

 

Rattling popping sound at new Lennox Furnace

New Lennox furnace installed January 2022 - over the last week I've noticed a rattling or popping sound within the unit when the burners ignite.

We're getting heat in the house, but don't want it to be another heat exchanger issue. On 2022-02-02 by Dylan

by Inspectapedia Com Moderator - rattling or popping sound in the Lennox furnace

@Dylan,

Nor do we.

Some gas furnace popping noises may be normal such as those caused by thermal expansion as the unit first heats up, but if the flame itself is making the noise, repair may be needed.

Take a look at the diagnostics at

GAS BURNER POPPING NOISES

and let me know what you find on your system.

...

Continue reading  at GAS BURNER FLAME & NOISE DEFECTS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see these

Recommended Articles

• BANGING HEATING SYSTEM NOISES
• BLUE vs YELLOW COMBUSTION FLAMES
• GAS BURNER FLAME & NOISE DEFECTS
• GAS BURNER PILOT LIGHT PROCEDURE
• GAS BURNER POPPING NOISES
• GAS BURNER RUMBLING CHUGGING NOISES
• GAS BURNER SOOT CAUSE & CURE
• GAS COOKTOP or STOVE IGNITER REPAIR
• GAS FIRED WATER HEATERS
• GAS IGNITER DIAGNOSIS & REPAIR
• GAS LEAK DETECTION, LP / NG
• GAS REGULATOR NOISES - buzzing, humming, and other noises at gas appliance regulators
• POPPING SNAPPING NOISE DIAGNOSIS
• WATER HEATER SCALE DE-LIMING PROCEDURE

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