Short answer? YES, No, yes!!!
Sorry! Just feeling mean...
1. But the seal is one of the things I might first look at and it can be replaced. Have you seen the test using a dollar bill shut in the door and see if it has some pressure as you pull it out at different places on the door? Funky, cheap test but you may spot a place where you are getting too much outside air.
2. I've never been happy with that working out to add.
3. But there are many sites with good info on testing the thermister and it is easy, just that I have to look to be sure every ten years when I get around to wondering!
Drives me crazy to wade through twenty minutes of "drama" to get the basics on U-tube, so I want YOU to do it!
Again, sorry bout that !
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Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!