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Old 06-01-2018, 12:20 PM   #1
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Brand: Thor Motor Coach
Model: 2017.5 Vegas 25.4
State: South Carolina
Posts: 10
THOR #10025
Vegas/Axis-Coleman Mach AC Poor Performance Fix

I happened to watch a video on YouTube posted by Russell of 2 Trail Hikers where he discovered the divider between the A/C output and return was not properly sealed causing alot of the cold air being sucked right back into the return from the un-taped sides of the divider.Thor only put one piece of tape across the top of the divider. This also causes a drop in air flow to all the ceiling vents throughout the coach.


I had very low flow to three ceiling vents so I dropped the A/C cover and sure enough mine looked just like Russell's so I sealed the divider across the top and both sides. BAM!!! The increase in air flow was fantastic, now the three vents that hardly had any flow were now blowing at least 70% 80% better. I recommend anyone with the Coleman Mach A/C unit to drop the cover and check the divider. Seems to be a very common problem when Thor installs the A/C unit.

It's an easy 20 minute fix requiring only a screwdriver an a roll of aluminum tape. Just remove the air filter screens and the six screws holding the cover to the ceiling, realign the insulated divider and tape around both sides. All credit goes to Russell!!!

Here is the link to the video:

https://youtu.be/BBzltw0e6z8
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Old 06-01-2018, 06:24 PM   #2
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Brand: Thor Motor Coach
Model: ACE 29.4 (2016)
State: Colorado
Posts: 16
THOR #3102
I had this same problem in my ACE 29.4 and I did a similar fix.
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Old 06-01-2018, 06:25 PM   #3
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Brand: Thor Motor Coach
Model: Four Winds 31W
State: Michigan
Posts: 481
THOR #9522
Gotta check mine. On our 31W we had pretty poor AC performance last weekend. Of course it was 95 degrees out with blasting sunshine and 0 shade but it's worth a look.
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2018 Four Winds 31W
1999 Aero Cub F-21 trailer
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Old 06-01-2018, 07:11 PM   #4
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Brand: Keystone
Model: Sprinter 302RLS
State: Tennessee
Posts: 19
THOR #11607
Just did this fix on ours yesterday. Plus my wife and I both like it cold so went ahead and dropped a 2nd AC unit into the bedroom vent. No issues with cooling now.
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Old 06-01-2018, 07:14 PM   #5
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Brand: Thor Motor Coach
Model: 2017.5 Vegas 25.4
State: South Carolina
Posts: 10
THOR #10025
Quote:
Originally Posted by TripleGGG View Post
Just did this fix on ours yesterday. Plus my wife and I both like it cold so went ahead and dropped a 2nd AC unit into the bedroom vent. No issues with cooling now.
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Old 06-01-2018, 07:14 PM   #6
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Brand: Thor Motor Coach
Model: 2017.5 Vegas 25.4
State: South Carolina
Posts: 10
THOR #10025
Quote:
Originally Posted by petefoss View Post
Gotta check mine. On our 31W we had pretty poor AC performance last weekend. Of course it was 95 degrees out with blasting sunshine and 0 shade but it's worth a look.
Definitely worth a look, our coach is cooling much better now.
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Old 06-01-2018, 08:02 PM   #7
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Brand: Thor Motor Coach
Model: THOR Chateua 35SF
State: Georgia
Posts: 4,026
THOR #11130
"Cool" video and fix, literally. I think that's a Coleman quality issue as all Thor does is install them. They come from Coleman as a "ducted" model or a single room version. I don't have a cooling issue but summer is just around the corner...gonna take a look at both this weekend.
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