Gas Stove Flame Goes Out When You Release the Knob

Use only checks that match the exact appliance or system and its official guide.

1. Check 1

   If you smell gas, hear a hiss, see an unlit burner with the knob on, or suspect a leak, stop trying to light the stove and leave the home immediately. Do not turn lights on or off, use a phone inside, light a match, or operate other electrical equipment; call the gas supplier or emergency services from outside or a neighbor's location.

   Expected result: There is a gas odor, hissing, an unlit burner after gas was opened, or uncertainty about whether gas is escaping.

   Next step: Do not re-enter or relight the appliance until the gas supplier, fire service or qualified professional says it is safe. Do not move the stove or inspect its connector yourself.

   Stop if: Stop all user checks immediately for gas odor, hissing, smoke, fire or symptoms such as dizziness or breathing difficulty.

   Why this matters

   Why: The flame-out symptom may have left unburned gas, and a leak cannot be safely diagnosed by repeated ignition. The CPSC treats suspected gas leakage as an evacuation and professional-assistance event.

2. Check 2

   Only if there is no gas smell and the stove is cool, record the exact pattern without a prolonged trial: does one burner light and then go out when the knob is released, do all burners do it, and does the flame flicker or appear weak while the knob is held? Do not keep the knob depressed to keep a flame burning.

   Expected result: Only one burner is affected, several burners are affected, the flame is weak or flickering, or the burner will not light at all.

   Next step: Continue only with the cool, external cap/head and moisture checks below. For multiple affected burners, contact the gas provider or a qualified appliance professional rather than adjusting the supply yourself.

   Why this matters

   Why: A single-burner pattern points first to that burner's accessible assembly or a model-specific local fault, while a multi-burner weak or flickering pattern can involve the gas supply or installation. Neither pattern proves a specific internal part.

3. Check 3

   With the controls OFF and the appliance cool, inspect the affected burner's accessible cap and head. If the exact manual identifies them as user-removable, confirm they are clean, dry and seated in the correct position; wipe away safe, visible spill residue with the method the manual permits. Do not enlarge ports, insert improvised objects, adjust a valve or work on the gas line.

   Expected result: The cap/head is visibly misaligned, wet or contaminated, or it looks correctly assembled but the flame still dies when the knob is released.

   Next step: Correct only the clearly documented, user-accessible assembly issue and allow moisture to dry. If the flame-out remains, stop using that burner and request service; do not hold the knob down during cooking.

   Stop if: Stop if cleaning would require removing a gas tube, disturbing an orifice, forcing a component, or reaching behind the control panel.

   Why this matters

   Why: Samsung and Whirlpool identify clean, correctly positioned burner components and dry ports as relevant external ignition checks. A correctly assembled burner that still goes out needs model-specific diagnosis; it does not prove that a sensor or valve is defective.

4. Check 4

   Check the surrounding conditions without moving the stove: note whether another burner is being lit at the same time, whether a downdraft hood is blowing across the flame, and whether the gas supply has recently been installed, changed or interrupted. Do not adjust pressure, relight repeatedly or pull the appliance forward.

   Expected result: Several burners are weak or flickering, the problem changes when other burners or a downdraft are used, or the issue began after gas-supply work or an interruption.

   Next step: Stop using the stove and contact the gas provider or a qualified installer/service technician for supply and installation checks. Do not adjust a regulator or gas valve yourself.

   Why this matters

   Why: Samsung associates a no-stay-lit pattern in its cooktop guidance with low gas pressure in some circumstances, and Whirlpool notes that downdraft airflow can affect flame stability. These are bounded manufacturer observations, not proof of the unknown stove's cause.

5. Check 5

   If the flame still goes out after the exact manual's safe external checks, or if the stove has a persistent clicking sound, uneven flame, repeated gas odor or any damaged connector, record the model label and the affected burner pattern for service. Keep the stove off until the diagnosis is complete.

   Expected result: The burner remains lit only while the knob is pressed, several burners are affected, the igniter keeps clicking after controls are OFF, or any gas or connector warning remains.

   Next step: Use qualified appliance or gas service. Do not hold the knob down during use, bypass a safety device, open the gas manifold, replace a gas part, or test the appliance with panels removed.

   Stop if: Keep the stove out of service for gas odor, damaged connector, persistent clicking, unstable flame or any need for internal access.

   Why this matters

   Why: The official sources support service or gas-provider escalation but do not identify a failed valve, thermocouple, regulator or control for an unknown model. Moving the appliance or bypassing its flame-safety system can create a gas or fire hazard.