Hi, if you are up for crawling around down under, check the wires coming off the grinder for corrosion & possible failure. Do the ele. valves work? Maybe the fuse is futzed. I think you can turn the impeller with a screwdriver if it is jammed. Good luck.Oh, we have stayed at Anvil Campground and also enjoyed our stay.kevin
You might try turning the screw on the end of the pump - a few turns. Sometimes they get jammed or stuck and turning the screw manually will clear it. There is a rubber cover on the end of the pump which has to be removed to get to the screw.Jack
That's your problem, something is stuck in the blades.It can be turned in either direction. Sometimes if you turn it back and forth what ever is jammed in there will break. If not it probably something that was accidently dropped into the tank or sink drain when the RV was manufactured,It's very simple to take the pump out. It just hooks on to the pipe the same way your serwer hose hooks on. Just unclamp the small hose and unplug the wires.Hold it so inlet is down, tap it, turn screw back & forth and it should fall out.The screw should always rotate freely if it is unplugged.