Water pump

Sure your's is bad? Over the years I've had numerous occasions with assorted RVs where mine stopped pumping (but I could hear it running). I'd disassemble them, find a sticky valve that once I touched it was no longer sticky. Tiny bits of trash that make it past the screen can hang a valve and stop the pumping and will be so small you never see it when you fiddle with the valve. If the motor runs and you can't see something like a torn diaphragm, you can probably make it work again.