Unlock the Right Part
for Your Repair
Find the exact part you need
Enter your model number to see parts that fit your machine.
Price Match Guarantee
In-stock parts ship the same day
365-Day Return Policy
Price Match GuaranteeChoose Product
Identify Problem
03
Find Solutions
HomeRepair HelpLG Oven RepairLG Gas stove burner not heating properly Repair
LG Gas stove burner not heating properly
When your LG gas stove burner is not heating properly, the burner flame may not be responding correctly when you turn the control knob from low to high. The most likely cause is a cracked, worn, or stripped burner control knob that cannot rotate the valve stem. If the knob is in good condition but the flame still will not adjust, the surface burner valve may be damaged, loose, or unable to regulate gas flow. A burner cap that is misaligned, warped, or damaged can also distribute gas unevenly and cause weak or uneven heating, so turn off the LG gas stove, let the cooktop cool, and make sure the cap sits correctly on the burner base. Finally, using cookware that is too large or too small for the burner can reduce cooking performance. These checks address common gas stove not heating properly and gas burner not heating up problems. Enter your LG range model number to find the exact replacement control knob, surface burner valve, or burner cap for your specific appliance.
01 - LG Range/Stove/Oven Control Knob
If a burner flame is not changing as expected when the burner valve control knob is turned from low to high, it's possible the knob is stripped out or damaged and unable to rotate the valve stem. Inspect the knob for any cracks or wear and replace if necessary.
Enter model number to search for the required part specific to your product
Top Solution
02 - LG Range/Stove/Oven Surface Burner Valve
If a burner flame is not changing as expected when the surface burner valve control knob is turned from low to high, it's possible the burner valve stem is damaged and not actuating the valve appropriately. If the valve stem appears loose or wiggles you should replace the surface burner valve.
Less Common
03 - Burner cap not on correctly
Since burner caps help distribute the gas evenly around the burner, a burner cap that is not positioned correctly on the burner base can cause the burner not to heat properly. Confirm the appliance is turned off and the stovetop is cool to the touch, then readjust the burner cap, if necessary, so it is seated properly on the burner base. If the cap is damaged or warped, the flame can be higher on one side than the other. Inspect the burner cap for damage; a damaged burner cap will likely need to be replaced.
Less Common
04 - Incorrect cookware size being used
For best cooking performance use a burner that is best suited for the size of cookware being used. Using cookware that is too small or too large for the burner is not recommended.
Less Common
Frequently Asked Questions
Why is my LG gas stove burner not heating properly?
Why is my LG gas burner flame low or weak?
How do I fix an LG gas stove burner that will not get hot?
How can I tell if the LG gas stove control knob or burner valve is bad?
How do I find the correct LG gas stove burner knob or valve replacement part?
Shop by Popular LG Range/Stove/Oven Models
Our Story
Family-owned and operated since 1912, Burke America Parts Group is the longest-running genuine appliance, HVAC, and outdoor power equipment parts solution in North America. At Repair Clinic, we're proud to be an international brand trusted by the pros as well as the DIY community.
About Repair Clinic
© 2026 RepairClinic.com