Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×

Go Back   Thor Forums > Thor Tech Forums > Maintenance and Repair
Click Here to Login
Thread Tools Display Modes
Old 05-27-2020, 03:11 PM   #1
Junior Member
Brand: Thor Motor Coach
Model: Damon Outlaw 3611
State: California
Posts: 3
THOR #18982
Unhappy Air flow at ducted vents not working

Hello everyone,
i'm looking for some input regarding a 08 Damon outlaw 3611, with 2 Carrier V A/C units. The RV is fully ducted and right now we are going through a 100+ degree heat wave and the cooling system is not keeping up in the least.
for some reason the first 4 vents are blowing heavy, then the next pair feel like someone is breathing on you, then the next single is blowing like the fan is on low, and lastly the pair of vents at the bed nook is barely working.

I have pulled some vents to see if there is blockage, and i feel air pressure, but for some reason the vents are not directing it?

Is there something I can do to increase air flow? or do I need to install another A/C Unit on the roof?
Please Help!!!

Damon08 is offline   Reply With Quote
Old 05-27-2020, 03:59 PM   #2
Senior Member
Travelin' Texans's Avatar
Brand: Redwood
Model: 36FB
State: Arizona
Posts: 1,766
THOR #3610
Be sure the vent portion that's into he duct is not so tall as to block air flow beyond it. On last 5th wheel the duct was about 1 1/2" tall into a 1 3/4" duct work, trimmed them down & used aluminum duct tape to seal the opening & duct work so it wasn't cooling the attic.
Fulltimed 10+ years
Sold '13 Thor Redwood 36 FB
Traded '13 GMC Denali DRW D/A
Replacement undetermined
Travelin' Texans is offline   Reply With Quote
Old 05-27-2020, 04:11 PM   #3
Site Team
16ACE27's Avatar
Brand: Thor Motor Coach
Model: ACE 27.1
State: Florida
Posts: 12,783
THOR #7035
Since it's an 08 I assume this has worked correctly in the past. Pull the inside cover of your A/C units, check the filters (duh) but more importantly check the divider plate between the suction and discharge to make sure it hasn't fallen down and can't get up. If the divider plate is not correctly in place the discharge air would much rather take the direct shortcut to the suction side of the fan rather than travel all the way down that ducting.
Ted & Melinda
2016 ACE 27.1
2016 Chevy Sonic Toad
2020 Chevy Colorado Z71 Trail Runner Alternate Toad
16ACE27 is offline   Reply With Quote
Old 05-28-2020, 04:01 AM   #4
Junior Member
Brand: Thor Motor Coach
Model: Damon Outlaw 3611
State: California
Posts: 3
THOR #18982
Thank you for the replies. I checked the duct work with an inspection camera and everything looks to be sealed and clean of any blockage.
I also pulled the filters and checked to see if the divider plate was still in the correct spot "it is"
I then went ahead and climbed up on the roof and removed the shroud to check the coils and all the lines to ensure there wasnt blockage from anything.
I think I am going to upgrade to 2 15k btu units for the added oomph, but I am worried that the ducting may not be able to handle it. I imagine that back when this was being made and sold they had the option to install 15k units with the same ductwork. Possibly even add a 3rd on over the bed and remove the manual vent. Any advice would be appreciated.
Thank you!
Damon08 is offline   Reply With Quote
Old 05-28-2020, 12:27 PM   #5
Senior Member
Brand: Keystone
Model: Sprinter
State: Florida
Posts: 1,422
THOR #15553
close the direct down dump vents on the A/C cover in the ceiling.
2011 Keystone Sprinter 323BHS. Retired Master Electrician. All Motor Homes are RV's. All RV's are not Motor Homes.
cavie is offline   Reply With Quote

a/c_not_working, ducted vents, lack of cold air, vents

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Campgrounds

Reviews provided by


This website is not affiliated with or endorsed by Thor Industries or any of its affiliates. This is an independent, unofficial site.

All times are GMT. The time now is 06:07 PM.

Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2023, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0 PL2