I've replaced my Citation Tri Mark door locks twice in the last two years for the same problem. Fortunately my coach is a class C so we can use the chassis doors when this happens. My last set of Tri Mark locks were the new and improved version and they failed within two months. As usual I notified Thor of the problem even though I am out of warranty with the idea that Thor owners have enough to worry about without having to worry about something as basic as a door lock malfunctioning. As usual, crickets.
I now carry a spare lock set and keep a screwdriver handy and am glad to have other emergency door options.
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