bfrizzo and frr12767,
If you have voltage to the Element and it doesn't heat, the element is open.
Amprobe can show current draw without any disconnection.
Jumping power directly may power the element, don't, If you had voltage to the element before, jumping won't help, and may burn out new element, many won't heat if there is no flow, valve(s) closed,
For a relay to work, it need power in from supply, and a power out to the heater(double for 2 pole/240), and will connect the input and the output if there is line voltage to the relay's coil, which gets it power from the control board and may be intterupted by door or other safetys.
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