I am looking for some fresh water system advice (2015 Hawk). In the past, I could turn on the fresh water pump and it would run only when the water was on. Over time, it got to the point where it runs almost constantly even though the water is not on. I have not found any leaks. Do the pressure shut off sensors wear out? Can it be replaced? Is the pump worn out? (I still get water when I turn on the faucet.) I hope one of the experts can help me.