Eliminating Tab 400 Rear AC?

rrcbov · August 2021

One night in a moment of frustration over the rear AC duct that blows at the side of my head, I removed the register and stuffed a towel in it. Turns out this works for me temperature wise. So my question is, are there any unintended negative consequences of blocking off this duct? I see three approaches. 1)something more elegant than the towel that’s in it now; 2)block it at the manifold on the CoolCat; and 3)remove the duct from the manifold and let the cold air flood the compartment under the dinette seat where the CoolCat lives.

Verna · August 2021

I would block the duct at the wall in the bedroom area. Resale value is a good reason. We all say this is our last T@B (yeah, go ahead and laugh, @ScottG!!), but sometimes life throws us a curve ball. Don’t make a change that you will have to explain to a new owner why you didn’t have time to put it back k the way it was.

My opinion is based on seeing a lot of new buyers last year who have already sold their new T@B’s within a year of purchase. Life changed, jobs were lost, had to follow a job, pandemic is slowed down and they can fly again—lots of valid reasons.

manyman297 · August 2021

I think it’s designed with three ports in mind. So blocking off one may cause too much positive pressure in the system and burn out the blower motor. Not totally sure about this though.

Pintoplumber · August 2021

There may not be enough air flowing across the coil that it may ice over.

marleecamps · August 2021

I also dislike cold air blowing directly on me. By rotating the duct cover 180 degrees, the air now blows upward over my head - which works for me.

AirBoss · August 2021

Spin the duct and/or damper it. I would be reluctant to block it entirely.

Katydid · August 2021

@manyman297 How is your rear A/C register mod working out?

manyman297 · August 2021

I haven’t modded mine. I just point it up and let the cool air fall down.

rrcbov · August 2021

I sent Dometic this question on their support form. I’ll share the response when I get it.

rhyno · August 2021

Check out my diverter fix. Details here and it works great.
https://tab-rv.vanillacommunity.com/discussion/comment/169761#Comment_169761

Katydid · August 2021

Thanks for the update @rhyno. It’s the one mod I’m motivated enough to do and that I might be able to accomplish.

manyman297 · August 2021

Ahh. Didn’t realize some people are referring to the older 400s where the duct was lower. Yeah, I can see how that could be annoying. Glad they moved that duct up.

rhyno · August 2021

@manyman297 - Our 2021 has the bed's AC duct at head level. Isn't your 2021 at that same height or is nuCamp moving the AC duct up to the top again?

Katydid · August 2021

I have the 3 way fridge on my 2021 . I think I remember someone saying that if you have the 3 way the duct is head level and if you have a 2 way it’s higher?

manyman297 · August 2021

rhyno said:

@manyman297 - Our 2021 has the bed's AC duct at head level. Isn't your 2021 at that same height or is nuCamp moving the AC duct up to the top again?

I'm losing my mind. You're right. I think your pillow threw me off as it looks like the duct is right at mattress height.

I actually don't find its location an issue as long as the register is pointing upward. I'd rather have it there than up high. I find that when it's really hot I like to just point it straight at me to get cool quicker.

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Eliminating Tab 400 Rear AC?

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