If you have a Furrion AC unit, you've certainly noticed the temperature fluctuations, especially if you try to use the heat without running the fan. Sticking the temp sensor through the filter media helps somewhat, but your AC may short-cycle with this configuration. The correct thing to do is relocate the temp sensor. GD will send you a free relocation kit if you ask support, but that involves running wires and finding a place to poke a hole.
The wiring from the Furrion wall controller to the roof unit MAY (your system may be different) include extra conductors depending on what Grand Design had available at the time they built your unit. In my case, I had extra conductors so I went ahead with this relocation method. Here's what I did.
disclaimer: do this at your own risk. It's not hard if you're used to working with small gauge wiring.
credit: [MENTION=36230]BigDinMB[/MENTION] for astutely noticing the extra conductors and asking if anyone has ever tried this

Step 1: Identify your wire bundle in your roof unit. Mine had three extra wires. We'll use white and yellow for our task today.

Step 2: Remove the wall unit. It comes off with a quarter turn lefty loosey. I also removed the backing plate as seen here since I needed to enlarge the factory hole in the wall slightly to get all those big blocky splice connectors out. (yes, my slide is only partly open... shame on me...)

Step 3: Isolate your spare conductors and strip away any outer insulating jacket to free up some slack.

Step 4: Cut off the existing temp sensor with enough slack on both ends of your cut to make some splices. No turning back now! Strip and splice the wires together. Splice each conductor individually, then optionally shrink wrap the whole works together for added strength. I used heat shrink solder connectors you'll see in subsequent photos. They work great.

Step 5: Splice your temp sensor leads to the remote ends of your spare conductors. I used heat shrink solder splice connectors but butt connectors would probably work too. The conductors in the wire bundle are not braided though and I don't like butt splicing solid conductors when solder is a thing that exists.
The wiring from the Furrion wall controller to the roof unit MAY (your system may be different) include extra conductors depending on what Grand Design had available at the time they built your unit. In my case, I had extra conductors so I went ahead with this relocation method. Here's what I did.
disclaimer: do this at your own risk. It's not hard if you're used to working with small gauge wiring.
credit: [MENTION=36230]BigDinMB[/MENTION] for astutely noticing the extra conductors and asking if anyone has ever tried this

Step 1: Identify your wire bundle in your roof unit. Mine had three extra wires. We'll use white and yellow for our task today.

Step 2: Remove the wall unit. It comes off with a quarter turn lefty loosey. I also removed the backing plate as seen here since I needed to enlarge the factory hole in the wall slightly to get all those big blocky splice connectors out. (yes, my slide is only partly open... shame on me...)

Step 3: Isolate your spare conductors and strip away any outer insulating jacket to free up some slack.

Step 4: Cut off the existing temp sensor with enough slack on both ends of your cut to make some splices. No turning back now! Strip and splice the wires together. Splice each conductor individually, then optionally shrink wrap the whole works together for added strength. I used heat shrink solder connectors you'll see in subsequent photos. They work great.

Step 5: Splice your temp sensor leads to the remote ends of your spare conductors. I used heat shrink solder splice connectors but butt connectors would probably work too. The conductors in the wire bundle are not braided though and I don't like butt splicing solid conductors when solder is a thing that exists.
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