Electric cooktop simmer setting

The two smaller burners on my 5 burner electric cooktop will not cutoff when set low most of the time. When I set the knob very low for simmer the one low setting coil comes on but then will not cycle on and off so the pan gets to hot.
Any input would be appreciated.

Hi.
Please provide complete model number and brand name.

Thank you.

Fisher & Paykel CE901