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HomeRepair HelpThermador Oven RepairThermador Gas stove burner not heating properly Repair
Thermador Gas stove burner not heating properly
If your Thermador gas stove burner is not heating properly, the control knob is the most likely cause, especially if the flame does not change from low to high when you turn it. A cracked, worn, or stripped burner control knob may fail to rotate the surface burner valve stem. If the knob is intact but the flame remains weak or unchanged, the surface burner valve may be damaged. Check the valve stem for looseness or excessive movement, and replace the valve if it does not open and close correctly. A burner cap that is misplaced, warped, or damaged can also prevent the gas flame from distributing heat evenly across the burner base. Turn off the Thermador gas stove and let the cooktop cool before reseating or replacing the cap. Finally, make sure the cookware size matches the burner, since an oversized or undersized pan can cause poor cooking performance. These checks address common gas stove weak flame and gas burner not heating up problems. Enter your model number to find the exact replacement control knob, surface burner valve, or burner cap for your Thermador range or gas stove.
01 - Thermador 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.
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02 - Thermador 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 Thermador gas stove burner not heating properly?
How do I know if my Thermador gas stove burner control knob is bad?
Could a Thermador surface burner valve cause a weak or uneven flame?
Can a burner cap or cookware cause a gas stove burner not to heat properly?
How do I find the correct Thermador burner knob or surface burner valve?
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