I have a 2007 Fleetwood Providence. I am visiting my sister in Rhode Island and parked I her driveway. I have water and cable o sewer hookup. I have to empty the black tank every 7 to 9 days.
On one trip to the dealer to dump the tank, the secondary air gauge started going from zero to operating pressure and back and the warning buzzer starts. I paid for a mobile RV repairman and he could not find anything wrong. So I went to empty the black tank and it started going up and down after driving about 10 miles and was intermittent all the way back but still cannot here an air leak. Any suggestions?