Forum Discussion
fpresto
Dec 28, 2013Explorer
Dave H M wrote:
Personally I think the air exchange theory is purely urban legend. I think the only air that could be exchanged up that length of tube is when the door is open, and that would not even figure in with the open door air release.
You are correct if the drain hose is installed correctly, however many are not; even from the factory. The hose should exit the refrigerator, go down in the compartment and the up to exit out forming a loop. It is kind of like a "P" trap. Water collects in the loop and blocks the air flow. If it is straight shot with no loop; then air can escape. Since the drain is in the bottom it is no different than having a hole in the back of the refrigerator and you do lose cool air. Under extreme conditions it could cost as much as 7 to 11 degrees. I have seen different numbers depending on who does the testing.
Ford's RV and Training Service has an entire series of YouTube videos on RV refrigerators diagnose and repair. This link is to number 3 in the series and it addresses the drain tube. Link. If anyone is interested in troubleshooting or repairing their unit I suggest watching all of the videos.
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