The dual element no longer works, however the light comes on to indicate it's working. Think that either the inf switch or the element is bad but unsure how to test to make sure what needs to replace. Can you please help?
To check to find out what the problem is with the unit, whether the infinite switch or element, you will want to do a voltage test at the infinite switch. If you check from H1 to H2 on the switch with the switch in the on position there should be 240 vac. If there is not 240 vac then the switch is faulty and would need to be replaced. If there is 240 vac the element is faulty and would need to be replaced.