Question, does the pump ever "stop" running? Or does it run and run and run?
Also, are you describing that now you have no pressure from any faucet including the shower?
I guess what I am wondering, and forgive me if it was covered already, but I am wondering if there is a pump bypass installed for winterizing the unit, and maybe it is in the bypass position?
This would explain if the pump was running and running and no pressure out of the faucets, and city water hookups still work as designed. The reason you may have started with shower pressure is maybe there was some residual pressure built up in the lines when you first checked, and eventually that went away.
On my first trailer I installed a bypass like this myself right near the water pump. But you would need to remove screws for a panel to access it.
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2022 Ford F150 3.5 Ecoboost SCrew 4x4 MaxTow
2020 Salem Hemisphere Hyper-Lyte 25RBHL
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