Check this recent post where I was discussing this with another member. Assuming your fridge is in good working order and it s not a cleaning or maintenance issue causing it, finding what and how the LP flame is being blown out can be a frustrating, time consuming process. The best, most reliable fix is to run the fridge on AC from an inverter while on the road, but it takes a bit of work to get your truck where it can keep the camper battery charged up enough to do that.
LinkyThere's a link in that thread to another of my topics showing just what it takes to get good charging voltage/current to the camper battery from the truck alternator.
Putting a shield or baffle on the lower door and the roof vent may fix most of the problem. It fixed mine about 90% of the time. Running from an inverter is the only 100% fix that I can recommend. I don't recommend the 12V mode because that heating element is usually sized so much smaller than the 110V element. Even on its best day, the 12V mode is marginal. I've actually disabled it on my fridge so it won't accidentally go into that mode. I'm out in our camper now, and despite the daytime temps being near 100, the fridge is staying very close to freezing, and the freezer is usually below zero.
:):)
2001 Lance 1121 on a 2016 F450 ‘Scuse me while I whinge.
And for all you Scooby-Doo and Yosemite Sam types………..Let’s Go Brandon!!!