Go Back   Montana Owners Club - Keystone Montana 5th Wheel Forum > MOC on M.A.R.S. > Repairs & Service
Click Here to Login

Reply
 
Thread Tools Display Modes
 
Old 04-07-2017, 04:25 PM   #1
vipermanden
Montana Master
 
vipermanden's Avatar
 
Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 530
M.O.C. #18510
Any quick fixes for A/C

We are on the road from Lake Tahoe to New Orleans, and are in Las Cruces, New Mexico, and The A/C is just not cutting it. We put it on 68 on both front and back, with all the day/night shades closed at 8 am this morning, and now it is 3:30 pm, and it is 89 outside and 79 inside. Yesterday, at the end of the day it was 87 outside, and about 82 inside! We are heading to Texas next, and it is supposed to be 95 for 3 days while we are there??? I thought these A/C units were supposed to give you a 20 degree difference from inside and out?
__________________
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
vipermanden is offline   Reply With Quote
Old 04-07-2017, 04:52 PM   #2
bigskyjimmy
Montana Master
 
Join Date: Aug 2010
Location: Washington Coast
Posts: 2,688
M.O.C. #10696
68?? heck I put both mine down to 58 and the fan on auto or high to start out and There has been a lot of posts about improving the whisper air here that work(I have posted a few) but the first thing to do for a quick improvement right now is Take off the louvered vents so the air shoots straight down instead of the hot ceiling then when you get time go to the search function and type in Whisper air mod or A/C mod and you can do the other improvements when you get more time like this notice the PVC pipe in the vents to prop up the duct work ,I also did this to the intakes/return to suck more air IN to the A/C Mine works great now
__________________
[
bigskyjimmy is offline   Reply With Quote
Old 04-07-2017, 05:15 PM   #3
kdeiss
Montana Master
 
Join Date: Feb 2003
Location: Englewood
Posts: 3,075
M.O.C. #164
You first need to check air Temp at return inboud to the unit then outbound their needs to be a 10 degree differential this way you can check if the unit is cooling!
kdeiss is offline   Reply With Quote
Old 04-07-2017, 05:34 PM   #4
vipermanden
Montana Master
 
vipermanden's Avatar
 
Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 530
M.O.C. #18510
I put my hand up to the vents, and it is cooler air coming in, but not much force? What the heck do we have 50 amps for? My Truck A/C blows much harder than this!! Do the round vents just pop off, or should I use some special tool? I don't want to break one, and have DW bitch at me for the rest of the trip. Thanks

Dennis
__________________
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
vipermanden is offline   Reply With Quote
Old 04-07-2017, 05:37 PM   #5
vipermanden
Montana Master
 
vipermanden's Avatar
 
Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 530
M.O.C. #18510
Now it is 4:30, and it is 91 outside, and 81 inside. I have the ceiling fan going, and a turbo fan blowing on me in the kitchen, to at least feel like there is cool air circulating on me! We even blocked the skylight in the kitchen with thick white paper bags, to reflect the sun back on that skylight.
__________________
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
vipermanden is offline   Reply With Quote
Old 04-07-2017, 07:33 PM   #6
kdeiss
Montana Master
 
Join Date: Feb 2003
Location: Englewood
Posts: 3,075
M.O.C. #164
Quote:
Originally Posted by vipermanden View Post
I put my hand up to the vents, and it is cooler air coming in, but norft much force? What the heck do we have 50 amps for? My Truck A/C blows much harder than this!! Do the round vents just pop off, or should I use some special tool? I don't want to break one, and have DW bitch at me for the rest of the trip. Thanks

Dennis
Do you have the fan on high speed?
kdeiss is offline   Reply With Quote
Old 04-07-2017, 07:33 PM   #7
jcurtis934
Montana Master
 
Join Date: Sep 2013
Location: Pensacola (mail forward service)
Posts: 2,517
M.O.C. #13740
If you noticed the three indents on the vents, you can insert a small screwdriver near one of these and slip it under the cover. You should be able to pry a little and it will pop open a little. Then move to another spot and do it again...then it should come off. You will now be able to see the piece that is screwed into the ceiling. If it sticks up into the duct too much, airflow will suffer. You can cut these down pretty easy. Also take note of how well this piece is sealed to the inside of the duct mine were crappy and leaked a lot of air into the attic. Retape any with adhesive backed aluminum ac duct tape which you can get at home depot, lowes, etc. On the air returns, take the covers off and take a picture inside the return with the ac running. It should be very open, but more than likely will need something to hold it open like a short piece of pvc tube. Hope this helps you.
jcurtis934 is offline   Reply With Quote
Old 04-07-2017, 07:36 PM   #8
MARK A
Montana Master
 
Join Date: Jan 2016
Location: STAYTON
Posts: 650
M.O.C. #18157
Quote:
Originally Posted by vipermanden View Post
We are on the road from Lake Tahoe to New Orleans, and are in Las Cruces, New Mexico, and The A/C is just not cutting it. We put it on 68 on both front and back, with all the day/night shades closed at 8 am this morning, and now it is 3:30 pm, and it is 89 outside and 79 inside. Yesterday, at the end of the day it was 87 outside, and about 82 inside! We are heading to Texas next, and it is supposed to be 95 for 3 days while we are there??? I thought these A/C units were supposed to give you a 20 degree difference from inside and out?
Open and run a ceiling vent. The hot air has to escape somewhere. That will leave more room for the cooler air.
__________________

2016 3610/2012 F-350 Powerstroke
MARK A is offline   Reply With Quote
Old 04-07-2017, 10:07 PM   #9
vipermanden
Montana Master
 
vipermanden's Avatar
 
Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 530
M.O.C. #18510
I discovered one culprit of stealing cool air, and that was the bathroom ceiling vent. When I got out of the shower, and I was wet, my feet were being blasted with cold air coming under the door, because the fan is so strong in the bathroom, it just shoots that cold air right up and out of the RV. So I turned the fan off, and just had the vent open, and there was no more cold air rushing under the door. So that particular situation was robbing all of the cold air that drops to the floor in the RV.
__________________
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
vipermanden is offline   Reply With Quote
Old 04-08-2017, 11:18 AM   #10
bigskyjimmy
Montana Master
 
Join Date: Aug 2010
Location: Washington Coast
Posts: 2,688
M.O.C. #10696
Yep that fantastic fan in the bathrooms really does work well for sure like ya said you can feel the air being sucked under the door and up they are great except you are right they will suck all the cold air out
__________________
[
bigskyjimmy is offline   Reply With Quote
Old 05-01-2017, 01:13 PM   #11
Bill.vannuys
Montana Fan
 
Bill.vannuys's Avatar
 
Join Date: Aug 2015
Location: Leavenworth
Posts: 243
M.O.C. #17706
I have 2 pieces of foam insulation that my wife covered with nice material. Each piece is cut to size and fits tightly into the basement (heater returns?) under our bedroom steps to stop the cold air from pouring into the basement. Saves the lost cooling that sinks and goes to the basement.

I just replaced the bedroom AC vents with ones that allow me to close them to shut off the airflow. That allows me to increase the airflow to the living area during the day by running both ACs with the bedroom vents closed.

Ours cools well in warm weather, but we keep the thermostat at 70 day and night!

Not sure if it is good for others, but works great for us.

Must remember to remove the return covers before using heater though.
__________________
Bill & Mary Van Nuys
Leavenworth, KS


2014 3735MK Legacy, Sailun 637s, TST 507RV TPMS, 2 T145 Trojans, Slide Toppers
2015 Chevy 3500 LTZ, 6.6L Duramax 4WD, CC, LB, SRW with Allison Transmission
Bill.vannuys is offline   Reply With Quote
Old 05-01-2017, 08:37 PM   #12
bigskyjimmy
Montana Master
 
Join Date: Aug 2010
Location: Washington Coast
Posts: 2,688
M.O.C. #10696
In my experience Bill closing the stairs off All year long is the way to go I have had mine blocked off for 6 years now of fulltiming in 3 Monty's with no Problems there is So much air in the basement and underbelly there is no need for vents in the stairs for the furnace to work just fine
__________________
[
bigskyjimmy is offline   Reply With Quote
Old 05-01-2017, 09:14 PM   #13
Golfmedik
Montana Master
 
Golfmedik's Avatar
 
Join Date: Apr 2016
Location: Auburn
Posts: 578
M.O.C. #18474
Pure and simple, the new style AC units suck! Mine has been back to the factory for this and the break in the nose, and I've really been unable to test them adequately since it came back. One thing, as already mentioned that I did was to take off the vent covers. Then take them down and cut the long part going up into the duct off with a knife or dremel tool. OR you can go to Walmart.com and order these just like the factory just put in mine.
http://https://www.walmart.com/ip/JR...-Vent/55486025

The necks on the factory ones are too long and do not let enough air flow into the coach. Mine is better with the new vent covers. I have a thread in this section about the saga I've had with these dang things.
__________________
2016 Montana 3790RD Legacy EditionOnan, TST TPMS, TrailAir pin
2013 F350 DRW 4x4 CC LBViair 10007, Ride-Rites, Westin HDx, 12k Smittybilt
Golfmedik is offline   Reply With Quote
Old 05-01-2017, 10:23 PM   #14
vipermanden
Montana Master
 
vipermanden's Avatar
 
Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 530
M.O.C. #18510
I'm thinking you picked the ones pictured on the left in your link, right?
__________________
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
vipermanden is offline   Reply With Quote
Old 05-01-2017, 10:35 PM   #15
Golfmedik
Montana Master
 
Golfmedik's Avatar
 
Join Date: Apr 2016
Location: Auburn
Posts: 578
M.O.C. #18474
Quote:
Originally Posted by vipermanden View Post
I'm thinking you picked the ones pictured on the left in your link, right?
Correct. Those are the ones the camper came back from the factory with.
__________________
2016 Montana 3790RD Legacy EditionOnan, TST TPMS, TrailAir pin
2013 F350 DRW 4x4 CC LBViair 10007, Ride-Rites, Westin HDx, 12k Smittybilt
Golfmedik is offline   Reply With Quote
Old 05-02-2017, 06:13 AM   #16
BiigDaddy
Seasoned Camper
 
Join Date: Aug 2016
Location: Detroit
Posts: 81
M.O.C. #18932
Here....It'll save you a couple bucks AND you don't have to give WalMart your money.

https://www.amazon.com/JR-Products-G...SSCWQWWA2&th=1
BiigDaddy is offline   Reply With Quote
Old 05-02-2017, 11:04 PM   #17
Todd727
Montana Fan
 
Join Date: Jan 2017
Location: Holly Springs
Posts: 111
M.O.C. #19394
Trying to figure out why one giant online retailer that puts small local stores out of business is so much better than a store also puts small local stores out of business? At least one of them lets many folks boondock overnight.

Of course, neither would be a factor if people really cared more about small local business than finding the absolute lowest price available.

FWIW, I shop at both.
__________________
2017 3950BR
Todd727 is offline   Reply With Quote
Old 05-27-2017, 05:32 PM   #18
vipermanden
Montana Master
 
vipermanden's Avatar
 
Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 530
M.O.C. #18510
Big Daddy,

OK, I purchased one from Amazon, and it fit right in and has a much shallower sleeve, so now I need to paint the foil insulation that shows when you look up into the vent. Plus it is a dull white compared to the color of the ceiling in my Monty. Anyone know what color the ceiling is? The vent covers were about 1/2" less in total diameter, so i will need to spackle and paint the crazy saw marks that are not a very nice circle underneath the stock OEM covers. I ordered more, but if anyone knows what paint color the ceiling is on a 2016 3820FK, I'd love to know. Thanks
__________________
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
vipermanden is offline   Reply With Quote
Old 05-29-2017, 09:00 AM   #19
phillyg
Montana Fan
 
Join Date: Aug 2015
Location: SWFL
Posts: 391
M.O.C. #17801
Perhaps you could borrow or buy an air temperature device, the kind that can properly measure the temps at each vent (I don't recall their actual name). At the ambient outside temps you describe, two ACs should easily keep you comfortable, and high readings would be indicative of air handling problems specific to your rig.

As an example, at 90 degrees and relatively high humidity in FL, my ACs do not run continually to maintain 72 degrees, and I have a front LR that is supposedly difficult to cool. I've made no mods to the ACs.

I recall a couple of threads about the need to better seperate the incoming air at the AC unit; perhaps someone else can chime in with that fix. I had a problem with the previous Wildcat; techs told me the ducting was "crushed" resulting in lack of air delivery, but I can't recall a single complaint about Montanas having that problem.
__________________
2016 Montana 3711FL
2005 Ford F350, 6.0 diesel, short bed
Demco Hitchiker Auto Slide hitch
phillyg is offline   Reply With Quote
Old 05-29-2017, 10:22 AM   #20
vipermanden
Montana Master
 
vipermanden's Avatar
 
Join Date: Apr 2016
Location: North Lake Tahoe
Posts: 530
M.O.C. #18510
There have been a bunch of threads about A/C units not working, and it seems to be a hit and miss thing like you said. I am taking it in to the service center in a couple of weeks, when it will be around 88 degrees in Reno, and let them determine if it is my actual A/C units that are not working properly, or the ducting is crushed like you mentioned. I did put 1-1/2" PVC in the return vents, and I am going to do it to all of the round vents, but after they take a look at it.
__________________
2017 3820FK Legacy Edition full body paint Montana, For Sale this November, 2018. 2016 Ram 3500 long bed Dually Cummins Turbo with air bags
vipermanden 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 Montana RV, Keystone RV Company or any of its affiliates. This is an independent, unofficial site.


All times are GMT -6. The time now is 09:29 PM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2018, vBulletin Solutions, Inc.