Our 2014 Bounder 36e has vacuflush in rear Master bath and on small storage cabinet is a off/ on toggle switch, which if off, vacuflush will not work. I've been told that can go bad. We haver had problems,  a seasoned traveler told us early in our rv trips ..lots and lots of water when u use it, and if it stops up,, gently use a plumbers friend!   Not sure about separate fuse..

Bob

We just had the pump fail in our 2016 Southwond.  I bit the bullet and installed a whole new pump assembly rather than rebuilding it. I never want to go through that again!

I'm interested in the macerating system for the next time, which I'm sure is coming.  Is it correct that you would take the existing discharge hose from the toilet, bypass the vacuum tank and pump assembly, and tie it into the existing hose running from the pump assembly to the blackwater holding tank?

Capt. Randy