You have turned on the propane power switch versus the electric power switch for the water heater? Does the red light come on and stay on? That is a warning that it failed to ignite on propane. Check the burner area for mud dauber nests, they love propane fumes.
WBCCI Life Member 5123, AIR 70341, 4CU, WD9EMC
TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell
2014 31' Classic model 30 twin beds, 50 amp service, 900 watt solar system, Centramatics, Tuson TPMS, disc brakes, 16" tires & wheels