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Why would a heater not put out heat in place and then bench test OK?


JACKVJR

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Caldera Kauai,  This one just gets curiouser and curiouser!  The heater had been unreliable for some time, but rebooting the power usually kicked it on.  For the first time, repeated rebooting would not get the heater to begin working.  I used a multi-meter and read 120 volts at each of the two heater terminals.  OK, got power to it, but feeling the outside with the hand, no heat; feeling the water coming out, no heat.  So this means the heater element is faulty, correct?.  Order a new heater.  While waiting for it to arrive, I removed the heater so as to be ready.  Just to try to determine what had failed, I bench-tested it by applying 120 volts to each terminal.  Without water in the tube, the heating element got red hot in seconds.  What am I missing here?

jack vines

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  • 7 months later...

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