I decided to change out the AC unit on my 2015 T@B and install a digital air conditioning unit to allow me the ability to turn it on/off and control the unit via remote control. It actually was much simpler than anticipated and I wanted to share some information to make this process easier for others who attempt this down the road. I'm also aware that there are other discussions on this process, but decided to share my experience as there are a few extra things that you can glean from my experience that might save you a little time and hopefully you will gain some peace of mind and courage enough to change yours out, while adding a nice update to your trailer too!
One of the first things you want to do is turn off the 110 V power that feeds the trailer to eliminate power to the electric receptacle that the AC unit plugs in to.
Remove the trim around the front of the AC unit by removing the two screws on front. The trim can then be gently removed and placed off to the side. The unit also has two long screws that come up from the bottom and hold the AC unit intact. These two screw must be removed and once removed, will allow for easy removal of the AC unit. You will see the screw heads beneath the unit and just behind the front wood face of AC storage rack.
The electric receptacle outlet will also need to be temporarily removed to allow for easy removal of the power cord when your old unit is taken out of the holding area above the bench on the driver's side of the trailer. The power cord remains intact on the old AC unit (no dis-assembly is required) and the new unit can be easily slipped into the opening once the old unit is removed. The face plate needs to be gently pried off from electric receptacle and is held in place by two small tabs (shown) on face plate. Once you remove the two screws holding the receptacle to the wood you can move it to the side and the power cord can now be removed.
This is what the empty rack looks like and as noted in the earlier write-up you will need to clean the drip pan out beneath the AC unit as there is dirt, grime, etc. in this area. I used a few damp paper towels and Windex to clean the pan and wipe it dry. You will also find that the old unit contains a pre-fabbed aluminum cowling that is taped to the back of the unit. This was used because the old unit did not extend far enough to the trailer wall and the cowling was used to suck fresh air into the AC unit and allow it to perform efficiently. The new unit is longer by about 3-1/2" and you will not need to use the cowling since the new unit sits up against the louvered vent fresh air intake area. Once the pan has been cleaned you can lift the new unit up and onto the storage rack.
You will notice that the new unit has metal legs beneath it. You can now re-install the two long holding screws, trim piece and electric receptacle and face plate. Plug new unit in, power up the trailer and be cool!
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One thing I will add as something of importance to do in the above install. Look at the old unit, specifically underneath the bottom pan of the old AC unit and see if there are any drain holes or water exit points on the bottom portion of the air conditioning unit. I say this because some friends also changed out their AC unit, converted to the digital model and later experienced some leaking or overflow of condensation from the unit. I was told by the factory to drill about 4 holes in the bottom of the new unit so that any condensation and water can drain down into the pan beneath the unit. This should eliminate the problem, but be careful when drilling so as not to damage anything above. 
. I know I'll crack the filter just as I cracked the first one ;(. But, I could meet up with 
