Some old-timer (older than me) once told me there is reason that most LP tanks inside a compartment DO NOT have a lock on the compartment door. That is so that if you are away, or can't find your key in the case of a leaking tank, you or a neighbor can get inside in a hurry to shut off or remove the tank. Don't know if that is why my Designer has no lock on the door or not, but it sounds reasonable to me.
2003 Ford F-350 V-10 Crew Cab 4WD Long Bed
2004 Jayco Designer Medallion 29 RLTS 5th wheel
Bill, Gayle, and Mindi (dachshund)
Retired at last !
Nothing is foolproof to a sufficiently talented fool.