Have you ever wondered how much security you have with the lock on your TrailManor door. Try this.....With your door locked and closed, hit the part of the door jam (the part that swings in for travel) with the heal of a closed fist. Pull on the knob at the same time. Did your door pop open. Sometimes it is not necessary to pull on the door knob and it will open when hit in this manner.
The cause: your right front stabilizer is raised too high, throwing the trailer door very slightly out of alignment, thus allowing your door to pop open.
The cure: Release the pressure on the stablizer a bit and try hitting the door again... If it pops open lower the stablizer some more. Repeat this test until the door remains shut.
This is also the cause of your needing to slam the door to get it to close.
Each time you set up your trailer and before you leave it to go elsewhere, retest your door. Otherwise someone can be inside your trailer faster than you can start your engine.
hs