Do you have everything set to run off the system use or city use? In our unit, we have to choose system use in the docking station to use the pump and city use if using city water. I forgot to change to system use when leaving a rv park once and about 3 hrs down the road we stopped at a rest stop and the pump wouldn't pull in water. It stumped both of us for a little while until I remembered and switched the knobs. I have also forgot to change to city before and had very little water pressure even though it seemed to run well from hydrant. Luckily I remembered before needing the shower. Hope your problem is as simple. We have all had newbie issues before.