One burner cannot regulate the flame. It remains very low regardless how much you turn the knob. All other burners are fine.
Answer Hello Johnny,
You will need to replace the gas valve for that burner. Since you didn't mention which burner is experiencing the failure, the burner part numbers are as follows. You will need to order and replace the one for the burner giving you the issue.
Single Valve, B-Burner-AP3727774
Single Valve, C-Burner-AP3773271
Dual Valve, D-Burner-AP3773250
Dual Valve, C-Burner-AP3773266