A sudden flare-up of fire when adjusting the knob of a gas stove can happen due to a phenomenon called "delayed ignition." This occurs when there is a buildup of gas in the stove or around the burner, and when you turn the knob to ignite or turn off the gas, the accumulated gas ignites all at once, causing a sudden burst of flame.
There are a few potential reasons why delayed ignition might occur in your case:
Residual Gas Buildup: When you are cooking at low heat, only a small amount of gas is being used, and some gas may still be present around the burner even after you turn off the stove. When you turn the knob to shut off the gas, the residual gas can accumulate around the burner. Later, when you turn the knob on again (even if it's just to turn it off completely), the accumulated gas can ignite suddenly, leading to a flare-up.
Dirty or Clogged Burner: If the burner ports or ignition system are dirty or clogged, the gas flow may not be as consistent as it should be. This uneven flow can cause gas to accumulate around the burner, leading to delayed ignition when you adjust the knob.
Faulty Ignition System: If the stove's ignition system is not functioning correctly, it may not light the gas immediately when you turn the knob. Instead, gas can continue to flow for a brief moment before it ignites, resulting in a flare-up.
To prevent flare-ups and ensure safe operation of your gas stove, consider the following tips:
Regular Maintenance: Clean your gas stove regularly, paying attention to the burner ports and ignition system. Make sure the stove and its components are free from grease, food debris, or other blockages.
Avoid Low Heat Settings: If possible, avoid cooking at extremely low heat settings, as this can increase the chances of residual gas buildup.
Wait a Moment: When turning off the gas, give it a few seconds before turning the knob back on. This pause can help dissipate any accumulated gas before reigniting.
Check Ignition System: If you notice persistent issues with delayed ignition or if your stove's ignition system seems faulty, consider having it checked and serviced by a professional technician.
As always, if you ever smell gas or suspect a gas leak, turn off the gas supply immediately, ventilate the area, and seek assistance from a professional gas service provider. Gas leaks can be extremely dangerous and should be addressed promptly.