A 1994 vintage rig probably has a LP detector that shuts off the gas flow if the LP goes off or has no 12v power. That might prevent the stove from lighting too.
Easy way to figure it out - turn the battery disconnect off and see what happens to fridge and water heater. They won't light. But to check the LP detector and gas valve, you would probably have to physically disconnect both chassis and house batteries because the LP unit is usually wired direct and often powered from both sources in parallel.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC