this means you need a new burner control for that one
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there are 2 switches that they are showing you need to match yours up with the 2 on this page do you have a local appliance parts house by you?
It matches part number #891942. How do you know it's not the board thats its connected to?
well you answerd your own question you said
front right small burner wont shut off without playing with control knob
and that inturns tells me that its the switch