RV News RVBusiness 2021 Top 10 RVs of the Year, plus 56 additional debuts and must-see units → ×
 

Go Back   Keystone RV Forums > Keystone Fleet | Keystone RV Models > Travel Trailers
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 06-30-2019, 07:27 AM   #1
vulcanwayne
Junior Member
 
Join Date: Apr 2019
Location: Robersonville
Posts: 9
AC not keeping unit cool

New 2020 model 3221bh passport with ac duct system. Unit does not provide sufficient airflow through overhead duct system to keep the trailer cool during daytime hours max of 95 degrees outside temps. Any suggestions?
__________________

vulcanwayne is offline   Reply With Quote
Old 06-30-2019, 07:57 AM   #2
Alpine
Senior Member
 
Alpine's Avatar
 
Join Date: Aug 2013
Location: Oregon
Posts: 753
Well now.... Welcome to the "Information Station!" I did a brief look at the specs of your travel trailer and it is very nice indeed. There will be other members along with more technical info and fixes. What I did notice however is that Keystone put only 1 AC unit on a 37 foot travel trailer... that is asking a lot from one AC unit. However there are a couple of simple inexpensive things to do to help your "right now" situation.

If you have the regular floor vents coming from the furnace, they can be covered with "magnetic floor vent covers" purchased from any big box store, Walmart, Home Depot, Lowes etc. This will keep your cold air from filling up your duct work coming from the furnace. You can also make a cardboard cover for the cold air return vent(s) that go directly to the furnace.
Attached Thumbnails
Click image for larger version

Name:	vent.jpg
Views:	60
Size:	29.1 KB
ID:	22519  
__________________

__________________


Jeff & Jan - Retired & Full-timing since 2013
2019 Ram Big Horn 3500 Aisin 4x4
2012 Alpine 3450-RL
TOYO 235/75R-17.5/16 J rated 125lb
Alpine is offline   Reply With Quote
Old 06-30-2019, 07:58 AM   #3
JRTJH
Site Team
 
JRTJH's Avatar
 
Join Date: Mar 2011
Location: Gaylord
Posts: 19,590
The Passport 3221BH is a 37' trailer. It comes "standard" with a 13,500 BTU air conditioner. The optional 15,000 BTU unit helps "a bit", but in reality, it will take at least two rooftop units to keep that trailer cool in 95F temperatures.

Some things you can do to help are:

Check the air return/supply box (in the filter area on the ceiling unit) to make sure the two are properly sealed. If cold air is being "sucked up the return" rather than being pushed through the ducting, it will reduce efficiency.

Check all the ceiling duct outlets to make sure they are properly sealed so no air is being lost into the ceiling cavity and all the cold air is being delivered into the rooms.

Check the "end run" beyond the last ducts to make sure they are sealed and not "allowing cold air to flow into the ceiling cavity.

Don't park in direct sunlight,

Keep the shades pulled to prevent hot sunlight from shining into the trailer.

Keep the awning extended to "shade" the side of the trailer from direct sunlight.

Start the air conditioner early in the day. It's easier to maintain the cool than to "overcome the hot"....

Consider a second rooftop unit if you have 50 amp shore power service. If you don't have 50 amps, then you're going to need to focus on the above suggestions since a second rooftop unit isn't an option without "very expensive electrical modifications"....
__________________
John



2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
JRTJH is offline   Reply With Quote
Old 07-04-2019, 05:30 AM   #4
DDavis
Junior Member
 
Join Date: Jun 2018
Location: Frenchtown
Posts: 6
I second JRTJH's comments. At the suggestion of other posters to the same issue, I checked my 2018 Cougar A/C plenum and found that the flimsy foam sheet that had been used to separate the intake and exhaust areas had collapsed allowing cold air to flow into the intake area even before it gets to the cover/filter area. Yesterday I taped it up with HVAC tape and now the air blows out the vents 10x better than it did.



You also will need to check the way the interior cover seals to the metal framework for the same problem. I added a layer of foam tape to that to improve separation of the airflow even more.
DDavis is offline   Reply With Quote
Old 07-04-2019, 05:48 AM   #5
NH_Bulldog
Senior Member
 
NH_Bulldog's Avatar
 
Join Date: Apr 2019
Location: Henniker
Posts: 550
I did a post with pics on this not too long ago. I had several issues that compounded to make the AC incapable of cooling the trailer. 1st as noted previously was the divider between supply and return wasn’t sealed. 2nd was that the ducts out of the supply plenum were either blocked with tape (one side) or not connected (the other side). 3rd was that the ceiling vents were not sealed to the ducts. 4th was that one of the end runs was open at the end. 5th and final was that the freeze sensor on the condenser coil was misplaced and was shutting off the unit thinking it had frosted up. After addressing all these issues (took an hour or two), that unit chills my camper like you wouldn’t believe.
__________________
Rob & Amy
2019 Passport 240BH SL
2015 Ford F150 3.5L Ecoboost SCrew 4x4 w/Max Tow Pkg
NH_Bulldog is offline   Reply With Quote
Old 07-04-2019, 06:52 AM   #6
Northofu1
Senior Member
 
Northofu1's Avatar
 
Join Date: May 2018
Location: Markham, Ontario
Posts: 1,439
I use these.

https://www.amazon.ca/JR-Products-AC...05401586&psc=1
__________________
Dan & Serena

2019 GMC SIERRA 2500 HD SLE
2015 Cougar X-Lite 29 RET
Northofu1 is offline   Reply With Quote
Old 08-06-2019, 12:32 PM   #7
Jimmie M.
Junior Member
 
Join Date: Aug 2019
Location: AZLE
Posts: 6
I just recently picked up a 2014 Bullet Premiere 31BHPR - having some of these similar air issues. I followed the steps above as far as sealing ducts etc. airflow is 10x better, will see how it does overall cooling in the camper. I called Keystone and my unit isn’t braced/wired/ducted for a 2nd a/c so fingers crossed!

My buddy has. 2018 Hideout 272LH with smaller a/c and it freezes you out!
Jimmie M. is offline   Reply With Quote
Old 08-07-2019, 08:02 PM   #8
Jimmie M.
Junior Member
 
Join Date: Aug 2019
Location: AZLE
Posts: 6
Should the exhaust/intake vent be “sucking” the filter up?
Jimmie M. is offline   Reply With Quote
Old 08-08-2019, 04:05 AM   #9
chuckster57
Site Team
 
chuckster57's Avatar
 
Join Date: Jul 2014
Location: Modesto
Posts: 12,406
Quote:
Originally Posted by Jimmie M. View Post
Should the exhaust/intake vent be “sucking” the filter up?


Welcome to the forum!!

If the filter isn’t secured to the grill then yes the AC will probably have enough air movement to pull it up into the return.

There may be tabs that you can use to put rubber bands across to hold it. When the AC is operating if you don’t get a 20 degree drop in temp at the grill then you probably need a new unit.
__________________

2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.

Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
chuckster57 is offline   Reply With Quote
Old 08-08-2019, 04:19 AM   #10
Jimmie M.
Junior Member
 
Join Date: Aug 2019
Location: AZLE
Posts: 6
Thanks - I haven’t tested the temp, it feels cold as long as you’re right next to it/under it, move away a foot or 2 and it’s just cool air.
Jimmie M. is offline   Reply With Quote
Old 08-08-2019, 07:31 AM   #11
wiredgeorge
Senior Member
 
wiredgeorge's Avatar
 
Join Date: Nov 2017
Location: Mico, TX
Posts: 2,627
Not sure why Keystone would sell a 37' trailer with only a 30A service. Seems it wouldn't cost them much, if anything to toss on a 50A service and wire/brace a vent hole for a 2nd A/C if the customer found that a 13.5K btu A/C was a virtual waste in terms of cooling a trailer that size. Looking on Amazon, a Progressive Dynamics 70A converter is virtually the same price as their 55A units. Cords probably cost more and the 1x3s used to brace are probably not a big deal nor is the install if the ceiling hasn't been tacked on yet. And worse, to put a 13.5K btu a/c in a trailer that size when a 15K unit is only nominally more expensive? Keystone should be ashamed and the designer of that thing should be duct taped to the bed on a 100F day with that A/C system pumping its best!
__________________
wiredgeorge Mico TX
2006 F350 CC 4WD 6.0L
2002 Keystone Cougar 278
2006 GL1800 Roadsmith Trike
wiredgeorge is offline   Reply With Quote
Old 08-08-2019, 07:42 AM   #12
Jimmie M.
Junior Member
 
Join Date: Aug 2019
Location: AZLE
Posts: 6
When I called Keystone and gave them the VIN, they did say mine was the upgraded 15k Unit, if that matters any. Anyway for me to check?

My buddies 272LHS is 13,5 and it freezes you out.
Jimmie M. is offline   Reply With Quote
Old 08-08-2019, 07:58 AM   #13
jack.knight
Junior Member
 
Join Date: Jun 2019
Location: East Providence
Posts: 2
I had a problem with air circulating in the wrong direction.[IMG]/Users/jk032116/Downloads/"ac intake"[/IMG], [/IMG]/Users/jk032116/Downloads/"ac exhaust"[/IMG], take off the four screws on the bezel and then the two screws of the deflector. turn deflector 180 degrees reinstall the baffle, reverse to reinstall the deflector and bezel. temp dropped from 84 to 72 degrees in about an hour
Attached Thumbnails
Click image for larger version

Name:	ac exhaust is intaking.jpg
Views:	35
Size:	317.4 KB
ID:	23134   Click image for larger version

Name:	ac intake is exhausting.jpg
Views:	31
Size:	105.0 KB
ID:	23135  
jack.knight is offline   Reply With Quote
Old 08-08-2019, 08:01 AM   #14
Jimmie M.
Junior Member
 
Join Date: Aug 2019
Location: AZLE
Posts: 6
I can’t see your photos
Jimmie M. is offline   Reply With Quote
Old 08-08-2019, 08:25 AM   #15
wiredgeorge
Senior Member
 
wiredgeorge's Avatar
 
Join Date: Nov 2017
Location: Mico, TX
Posts: 2,627
Quote:
Originally Posted by Jimmie M. View Post
When I called Keystone and gave them the VIN, they did say mine was the upgraded 15k Unit, if that matters any. Anyway for me to check?

My buddies 272LHS is 13,5 and it freezes you out.
I have a 27' fifth wheel. I upgraded my 13.5 to a 15K btu new A/C. Helped only a bit. I sealed all my ducting with care. I covered all my windows with 80 percent tint (keeps 80 percent of UV out and they are DARK!). I carry an 8K portable A/C that I vent out a cabin window when temps are 100F plus. Still not as cold as I would like but passable.

Some reputable Texas dealers will only order their larger trailers (where available) with two A/C units and even then, direct Texas sun and lack of shade in many parks will make it tough to keep cool in August. There ain't much insulation in an RV!!!
__________________
wiredgeorge Mico TX
2006 F350 CC 4WD 6.0L
2002 Keystone Cougar 278
2006 GL1800 Roadsmith Trike
wiredgeorge is offline   Reply With Quote
Old 08-13-2019, 03:39 PM   #16
CaptnJohn
Senior Member
 
Join Date: Dec 2015
Location: Ocean Isle Beach
Posts: 1,345
When I ordered my 34’ Cougar I ordered 2 ac units. My HC arrived with 2. My Montana has 3. No trailer over 26’ should have only 1 ac in my opinion. Not even if you do not travel to the hottest areas.
__________________

__________________

2019 Montana 3761 FL
2019 F350 6.7 4X4 DRW

Edgewater 205 EX Yamaha 150
CaptnJohn is offline   Reply With Quote
Reply

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
Forum Jump

Powered by vBadvanced CMPS v3.2.3
Disclaimer:

This website is not affiliated with or endorsed by the Keystone RV Company or any of its affiliates in any way. Keystone RV® is a registered trademark of the Keystone RV Company.


All times are GMT -8. The time now is 09:28 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
×