Fixed!!!!
Thanks to everyone who responded. Got her done and now enjoying hot water...helps to turn the system on at the bedroom control switch. Hooked up to the farm faucet for ongoing incoming water...with filter and pressure gauge.
Suffice it to say, you all are great resources that help walk us through the problem to solution. As a relatively new RVer (been on a total of 4 trips) still working out the kinks. You remain my saviors.
Wolfstar
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