Originally Posted by Al and Missy
Check your fridge for a "Climate Control" switch. It should be OFF. This runs heat strips in the door frame to control condensation.
Dunno what they're installing in 2018 models, but my 2017 International Serenity 27FB has a Dometic 3762 that has the anti-condensation heater, but no switch to turn it off, unlike older models. It's on all the time, drawing power...which is annoying, since I live in the dry Southwest and have no need for it.
Here's what the 3762's service manual says:
"5.7 Climate Control Heater
The climate control heater keeps the frame from sweating in high humidity. Unplug the light green wire from J3 (Gray incased control module) or the light blue wire from P5 (Flip cover control module) and test for proper ohms. From the light green wire or light blue wire to ground the reading should be 24 ohms +/- 10%."
I have not yet dug into the guts to pull off the appropriate wire and disable the heater, but it's on my list. Who needs another phantom load?