Dumping Holding Tanks

If it's the impeller no need for a new pump. $38 and about an hours time is all it takes.
RVing can be an expensive hobby, no need to make it worse. All the major brands make a repair kit.
.Shurflow macerator repair kit.

You can try turning the manual crank handle - check your manual for location and how to do this. This will turn the impeller manually and if there is anything that is blocking it, this is supposed to clear it. If it does not turn there is a jam in the macerator. If it does and when you later push the button and hear the macerator motor running but nothing comes out - the impeller is gone or it is time to replace the macerator (apparently again).

Sorry, both wrong.

I checked with the dealer. They did not empty the tanks. They said if they did, there would have been an extra charge but they confirmed it with the technician.

Sounds to me like the macerator pump impeller has failed. That happened to me on my Roadtrek. The impeller is made out of some sort of rubberized plastic so an obstruction won't burn up the motor, but it doesn't stand up to well over time. There will be a different sound it makes if the impeller isn't working - when it's doing it's job you will hear a pretty distinct noise when you start it, otherwise it may be so quiet that you don't even know if it's running. The motor itself is very quiet and all the noise you hear is generated by the spinning impeller if it's doing its job.

The good news is the macerator pump can be removed, repaired and replaced without having to dump the tanks provided the dump valves remain closed and don't leak. I did mine myself, and it's not all that difficult but there is very little room to work. I had to drive up on some planks to make more room to work and it's a bit unnerving to be working on the sewer system knowing that there are two tanks full of waste just inches above your head!

In a Roadtrek with a built in macerator don't put ice down into the black tank unless it is a very hot day and you are sure that all of the ice will melt before you dump through the macerator. If you do, you will destroy the macerator blade and impeller.

Are you sure that the macerator is working - put some water into the grey tank and dump that to be sure the macerator is working. The black tank is off from the drain in the toilet and this is why a flex wand is needed for the Roadtrek 190 if going to flush the tank with a wand. There is the emergency clean out plug next to the macerator under the van. If something is clogging the macerator line, this can be opened - and it will let everything out - right down below so stay clear and expect a big clean up job when you are done. It comes out with the opening of each dump handle - black first, then grey.

Through the macerator there is NO discharge through gravity.

Put several gallons of water down each tank - as suggested above, and dump. Don't take any chances going into the winter that there might be a lot of water in either the black or grey tanks.

Usually when a dealer service has to empty your black or grey tank to do a job they are going to charge you for it. you could call them to check - but if they did you would have been told about it when you saw it on the bill. Unless they did this as part of the install to make sure the hose held firm. Call them and see.

" dealer yesterday to have the macerator sewer hose replaced."
I'd bet that the dealer did empty or make sure the tanks were empty before or after. Maybe just checking to make sure there work didn't leak.

Ken

Is it possible that the dealer dumped when they had it?

Even if the pump was not working, would we not get some discharge from gravity?

Dump valves were open black first - gray last. Nothing.

The pump was replaced about two years ago so it should be good for now. Something to check however.