The part(s) or condition(s) listed below for the symptom Gas stove burner won't turn off are ordered from most likely to least likely to occur. Check or test each item, starting with the items at the top of the page.
A stove burner that won't turn off could be caused by a faulty burner valve that is unable to close. Try removing the control knob and turning the valve stem by hand. If the stem will not rotate, or the burner stays on in the off position, the valve is likely defective and should be replaced.
A stove burner that won't turn off could be caused by a faulty surface burner valve that is unable to close. Try removing the control knob and turning the valve stem by hand. If the stem will not rotate, or the burner stays on in the off position, the valve is likely defective and should be replaced.
If the burner control knob is cracked or broken it may not be turning the gas valve stem. Inspect the knob for any damage and replace if necessary.
If the burner knob is cracked or broken it may not be turning the gas valve stem. Inspect the knob for any damage and replace if necessary.