Hardly any cold air through any of the ceiling vents in my Prowler
- Thread starter JohnD
- Start date
Hi John,
What if anything have you done thus far to troubleshoot this?
I'm guessing you have the chill-grate below your AC?
What'd I'd check:
What if anything have you done thus far to troubleshoot this?
I'm guessing you have the chill-grate below your AC?
What'd I'd check:
- When you open the chill-grate, does super cold air blow out from it? If not, you likely have an issue with the AC unit (compressor etc.). Stop at this step and call a Dometic or Coleman (depending on what you have) certified tech
- Remove chill-grate completely to expose bottom of AC unit. Look for a sheet metal piece near the center that divides the return air from the output air. Make sure it is firmly in place. Use foil-tape to seal it if needed
- While exposed, look at and feel inside the plenum in the ceiling. If needed, smooth out transitions with foil-tape if needed
- If your return air for the ACs have grilles with filters, remove and clean them
- Do the same for your output grilles
- Remove the rooftop cover from your AC unit and any foam material and inspect for any blockages
JohnD
Moved on to the next thing...
When I open the vent on the bottom of the AC it blasts cold air into the kitchen and living room.
But when I close that vent, then hardly any cold air makes it out of the eight ceiling vents throughout the trailer.
Pulling the Prowler out of storage tomorrow as we are going on a short trip to Sedona on Monday, so will check things out.
But when I close that vent, then hardly any cold air makes it out of the eight ceiling vents throughout the trailer.
Pulling the Prowler out of storage tomorrow as we are going on a short trip to Sedona on Monday, so will check things out.
John - sounds like your AC is actually working well, producing chilled air. Now you just need to get that chilled air out of the ducts. I'd still suggest you go through my list to start your process. Continue to post your tests and findings here in your thread for it and we'll all do our best to assist.
CarterKraft
Well-known member
Time for the Timk tent in the vent mod.
Good answer!
CarterKraft
Well-known member
Of all the mods that we think are important that really is the only one I think should have been done at the factory. Night and day difference from before and after. I have been camping for 4 years in Texas summers with one 15K a/c unit in a medium 5th wheel size trailer, that wasn't going to be possible prior to the TimK mod.
Bogie
Well-known member
John,
While my Sundance had air flow at all the vents, the volume at the bedroom vents was very low. I pulled down the interior trim for the bedroom roof vent and discovered that the AC ducts on both sides were open (probably prep for front AC) and leaking into the ceiling cavity. I sealed these and it helped. I also found that the AC itself was not well sealed in and around where the AC met the ducts. I sealed around there too and it also helped. But, the biggest difference was the TimK sheet metal mod. That helped quiet a bit. Give it a try.
While my Sundance had air flow at all the vents, the volume at the bedroom vents was very low. I pulled down the interior trim for the bedroom roof vent and discovered that the AC ducts on both sides were open (probably prep for front AC) and leaking into the ceiling cavity. I sealed these and it helped. I also found that the AC itself was not well sealed in and around where the AC met the ducts. I sealed around there too and it also helped. But, the biggest difference was the TimK sheet metal mod. That helped quiet a bit. Give it a try.
Kbvols
Well-known member
When I had my Greystone I did the Timk tent mod it made a huge difference. I also used some foam board and cut to fit inside of vents and blocked those in the living area of the coach . That created a dedicated flow to the bedroom and bathroom and made a huge difference in those areas with minimal effect to the cabin area.
Sent from my iPad using Tapatalk
Sent from my iPad using Tapatalk
JohnD
Moved on to the next thing...
Anyone have any photos of the TimK mod?
I saw the ones on the PDF file that Dan posted to, but they don't show it very well or after the install was done (unless my eyes are worse than I thunked
).
I'm headed over to the storage lot in a few minutes to grab the Prowler so we can get ready to roll on Monday for a short trip up north (Sedona).
I saw the ones on the PDF file that Dan posted to, but they don't show it very well or after the install was done (unless my eyes are worse than I thunked
).I'm headed over to the storage lot in a few minutes to grab the Prowler so we can get ready to roll on Monday for a short trip up north (Sedona).
Shortest Straw
Caught In A Mosh
John, I am not sure which system you have on your rig but it sounds like you have the in-ceiling vents which would connect both ac's if you had two? If that is the case you need to block the ducting right after the last two vents on either end. It will help a bunch and you will not bee cooling your closet or the ceiling above your rear cabinets. I used a chunk of foam on mine and just crammed it into the space.
CarterKraft
Well-known member
I used some flashing I had but it is really too thin. I need to do a do-over with some thicker sheet metal 22ga maybe?
I don't have a picture that shows it but on the end of the tent "wings" I bent those down 90* and secured the ends to the interior of the A/C box frame with two screws on each side.
I don't have a picture that shows it but on the end of the tent "wings" I bent those down 90* and secured the ends to the interior of the A/C box frame with two screws on each side.
