The manual for my vacuum toilet in a 2013 35k Bounder says that occasional vacuum leakage is normal. After hearing the pump run every 15 minutes all night, the dealer said that was normal. How often d...
If it ever runs when not being used, there is a problem. The good news is the problem is most often cured by a good cleaning of the seals. Baring that, adjust or replace the seal...not a big deal.