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Old 08-12-2019, 09:47 AM   #1
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Upgrade A/C on 2018 DX3

I know there are lots of threads on A/C's. I have read them, but didn't find anything on upgrades. Knock on wood, I don't have the issues with water in the coach.

Has anyone upgraded the A/C unit(s) on a DX3? I have a 2018 with the Atwood models. I would like more cooling power! I THINK I read the back only has a 13.5k model, I assume that could go to 15k? Are there more powerful/more effective/high CFM models that could go in the front?

I imagine it would be easier to stay with Atwood since the controller is already wired in AND its already hooked up to the auto-start generator. But if its feasible to swap that out to make everything work better, I'm open to it.

Thanks!
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Old 08-12-2019, 05:10 PM   #2
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Ugh, I did a test today. It was 67* inside this morning. Left it set on 70*. Air temperature is 93*. By 5pm it was up to 82* despite being on all day.

I am out of warranty. If I take it into getting it repaired, I guess I should ask about this divider I saw referenced as potentially a problem. Anything else specifically?

Do others A/C's keep the coach cool in the mid-90s or is it definitely a problem?
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Old 08-12-2019, 05:26 PM   #3
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You should not have an issue...the Atwood IS the best cooling AC out there (15k is rated at 18k....but not sure how they come up with all of that). I would...
#1 check the divider baffle,
#2 make sure the filters are clean
#3 make sure an air vent is not blowing directly on one of the sensors.

You have both AC's running?
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Old 08-12-2019, 05:39 PM   #4
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You should not have an issue...the Atwood IS the best cooling AC out there (15k is rated at 18k....but not sure how they come up with all of that). I would...
#1 check the divider baffle,
#2 make sure the filters are clean
#3 make sure an air vent is not blowing directly on one of the sensors.

You have both AC's running?
Thanks Brian. Yes, I have both A/C's running.

1) I just found a schematic. I will go check the baffle now.
2) I cleaned them thoroughly last night before the test.
3) I have 2018 37TS. Do you happen to know where the sensors are?
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Old 08-12-2019, 05:48 PM   #5
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3. not really. The senors ARE the thermostat unless the thermostat is behind a door and then it will be a small dome looking thing on the wall.
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Old 08-12-2019, 06:52 PM   #6
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the thermister for the cold air is in the return duct, it looks at the temperature

in the room going up the return.

The cold air from the unit is right next to the return and it has a baffle that

seperates the ducts. Take the grille cover off and you then can see

if the baffle is there, there was a thread on here a while back, i will see if

I can find it or some pictures.
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Old 08-12-2019, 08:01 PM   #7
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Here it is, go to post #7 of this thread.

Atwood Thermostat
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Old 08-12-2019, 08:13 PM   #8
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Here it is, go to post #7 of this thread.

Atwood Thermostat

Yep, that was it. The baffle on both A/cís was pushed out of place by a significant amount. Immediately cooler after adjusting it. Iím going to leave it on during the day tomorrow to see how it does and pick up some tape on the way home to lock it in place.

That was amazing and literally made my day. The previous owner mentioned it had never worked right, which is why I started thinking about a replacement. Amazing to get it fixed 10 minutes.

THANK YOU ALL!!
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Old 08-12-2019, 08:22 PM   #9
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I tried to get dynamax to install a third a/c in my XL and they insured me that it would be efficient in cooling capacity. I was in the Florida keys a couple of weeks ago and the front unit wouldn’t cool below 85 degrees. The designer should experience a hot day in a box , just saying
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Old 08-12-2019, 08:34 PM   #10
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Here is another thread discussing this issue

AC Not cooling??? Check baffles and duct.
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