AC Ducts blocked??

BU

budbon

Advanced Member
Joined
Oct 29, 2020
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46
First time out with our 2250RK. We are in Yuma, 97 degrees. Hooked up and turned on AC. Cool air out of the AC and the kitchen vent, but no air going forward to the bath and bedroom. I'm assuming some sort of blockage to ducts going forward but did not want to begin taking off shroud before getting some insights.

Have any of you experienced this on 2250RK?
 
Your ducts are probably not properly taped to the registers and you are blowing cold air into the roof. You could also be leaking supply air into the return air chamber in the unit.
 
budbon said:
First time out with our 2250RK. We are in Yuma, 97 degrees. Hooked up and turned on AC. Cool air out of the AC and the kitchen vent, but no air going forward to the bath and bedroom. I'm assuming some sort of blockage to ducts going forward but did not want to begin taking off shroud before getting some insights.

Have any of you experienced this on 2250RK?
Click to expand...

Don't know how much time you spend in the desert; we spend a lot of time camping in the Phoenix area. You would be most likely preducted and prewired for a 2nd AC unit in the bedroom, might look into that as you trouble shoot things. We were camping this weekend and really enjoyed two full sized 15k AC units.
 
Did some more research on Youtube. Discovered the baffle between the intake and exhaust was loose allowing most of the air to recycle without getting to all of the ducts. It seems that is a common problem. Doesn't speak very high of Grand Design quality control.
I understand they have installed a different baffle system since 2020.
 
J Maguire said:
Don't know how much time you spend in the desert; we spend a lot of time camping in the Phoenix area. You would be most likely preducted and prewired for a 2nd AC unit in the bedroom, might look into that as you trouble shoot things. We were camping this weekend and really enjoyed two full sized 15k AC units.
Click to expand...
I think he is stating he has a 2250RK. If so, it is not prepped for a second AC due to the small overall length of the unit. It isn't even wired for a fan....ask me how I know :)
 
budbon said:
Did some more research on Youtube. Discovered the baffle between the intake and exhaust was loose allowing most of the air to recycle without getting to all of the ducts. It seems that is a common problem. Doesn't speak very high of Grand Design quality control.
I understand they have installed a different baffle system since 2020.
Click to expand...

What year is your 2250RK? They did start putting the air flow baffle mod in on newer units starting late last year.....if you have a 2021, you could call GD customer support and see if they will send you one....(assuming you have the Coleman Mach AC and not the Furrion).
 
I’m having the same problem with my 2021 2250RK. Can you elaborate on what you did to fix it? I’m handy but have no clue about air conditioning stuff. Thanks!
 
I've got a 15K unit sitting on my patio waiting to go in my 268BH. That will be 30K BTU of cooling in a fairly small 5th wheel. My condo doesn't have that much air conditioning. It only has 2 tons.
 
BobLandry said:
I've got a 15K unit sitting on my patio waiting to go in my 268BH. That will be 30K BTU of cooling in a fairly small 5th wheel. My condo doesn't have that much air conditioning. It only has 2 tons.
Click to expand...


Yes but your condo is much better insulated.
 
I did a YouTube search for "RV AC mods." I bought some rigid foam at the big box store and did my version of the modification. Not quite as neat of a job, but every bit as functional. Now everything is working great. That is everything AC is working. You can buy a baffle upgrade for $180, or for $15.00 and a little time, do it yourself.
This is a great forum. The folks here are very helpful and responsive. We bought our 2250 RK from a private party this winter. Last week (April 1st.) We came to Arizona for business, and used the trip as a shakedown. I have used this forum to get up to speed on a number of issues with our trailer. With this forum, you have a group of wise, experienced friends in the wings ready to help.
THANKS, ALL OF YOU!
 
We have a ‘21 2250RK. Just turned on the AC last week. I am concerned why the bedroom stays so warm. I see there is only one vent and it is close to the thermostat in the bedroom. I checked the temps and living room was showing 81 (stand alone thermostat) but the RV thermostat in the bedroom was showing 73. It didn’t feel 73. The air keeps shutting off before the kitchen/living room is cooled off.
 
Your cold supply air is being drawn into the return air chamber causing oit to short cycle.
 
How do I fix this? I am staying in my 2250 Monday - Friday due to a work relocation. Decided to camp rather than pay rent somewhere. Traded my Jayco for my Grand Design. Good trade, but learning all over. This has been the only issue so far. Very happy with this RV. Thanks for the help.
 
It's tough to explain if you aren't familiar with A/Cs. You have to tape up the A/C plenums so they are separated. You could also have ducts that are not taped to the ceiling grills pumping cold air into the ceiling. You would have to pull the supply grills and inspect them and tape where needed. I don't knowhow to explain it to you in detail.
 
I watched a YouTube video of a guy doing a modification on his AC. I bought some rigid foam and did the same. Worked great. Spent about $15.00. Bought the foam at Home Depot. Got much more than needed. Check out Hobby Lobby.
Type "Grand Design AC Mod" into YouTube.
Good luck.
 
Search on my user name for recent threads. There is another one where I linked YouTube videos for Colman and Dometic. And then I reported in about just having done it to my Dometic.

The unit isn't directly Grand Designs fault - they buy what they can get, and what they can buy isn't all that good. Hence why they have started to include the RV Airflow solution in some models lately.
In any event, it's an easy mod for $20.....
 
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