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UPDATE! ! I found that the switch on the water heater is the only way to turn off the 110v side of the heater. I will be installing a 20 amp wall light switch beside the monitor so that it will be easier to turn off and on.
I found as suggested that both 40 amp fuses were blown but did not fix the problem. I searched more and found that one wire to the fuse panel had pulled out. Hooked it up and have 13.6 volts now. Thanks for all the help. John
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