After making this post is when I finally realized Digger also had a burner assembly how-to. My bad. Didn't mean to step on any toes, Digger. After taking the PUP out a few weeks ago; we had everything up and running on 120V before our departure. I did not test the refrigerator on propane while at home because it worked perfectly the last time we used it. Unfortunately, the refrigerator didn’t work at the camp site; so we had to transfer everything to the cooler. As a result, I figured I would create this write-up for doing maintenance on the PUP’s refrigerator. Below is my experience in cleaning the burner and cleaning the 12V/120V switches in a Dometic 3-way. I did not detail removal and reinstallation of the refrigerator. This is just my thoughts, but I think what prevents the refrigerator from working properly is that the burner gets lodged full of rust particles from the various pieces of the refrigerator. You’ll see from the photos below that the flue, flue top, baffle, baffle hanger, burner assembly, etc all have surface rust. The rust slowly breaks free, falls onto the burner and prevents a good flame. Keep in mind that the pilot light might work perfectly but unfortunately the flame will not. Burner cleaning. Keep in mind this is after removing the refrigerator and placing it on a work surface. Remove burner assembly located just below the flue. You’ll also need to remove the propane line, ignitor and thermocouple. Ignitor and thermocouple are both held into place by one screw and bracket. Hopefully that removal step is self-explanatory since I didn’t take a photo. You’ll notice the stainless steel orifice located inside. Be sure not to lose it! Using various tools, clean the interior of the burner assembly. There is a lot of gunk that get lodged on the interior. I used a drill bit sized just perfectly to fit inside and carefully drilled the inside just enough to dislodge the buildup. If using this method, take care not to remove any material from the assembly itself. Photo below shows just how much was removed after one cleaning / drilling. Clean the burner itself [sorry, no photos]. I used brake cleaner and compressed air. Just make sure there is no particles anywhere. Also used brake cleaner on the interior of the assembly after the drilling process. Also notice that the end of the hard propane line also has some surface rust. I lightly sanded the surface until clean. Remove the flue top, baffle, baffle hanger and clean all from surface rust. The flue top might have considerable rust. You may elect to spray paint yours. I’d recommend high temperature stove type rattle can paint. I elected to replace the wire/holder for the baffle as the original one was pretty rusted. I simply used stainless steel safety wire shaped to resemble the original. The stainless isn’t prone to rusing. Clean flue. I bunched up a small rag and pushed it through the flue a few times using an extremely long 3/8” socket extension. Reinstall everything that you removed and barring any further problems, you should have a working refrigerator again on propane.