Reply
 
Thread Tools Search this Thread Display Modes
 
Old 07-26-2016, 09:15 PM   #15
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,550
Obviously something needs to be done to remove more heat from the condenser. If the air flow is not somehow vented to the outside, I think it's a lost cause. Bottom line is in order to remove heat from the frig/freezer, that heat has to be moved somewhere. Just leaving it in the cabinetry won't work. I notice that mine exhausts thru the grill above the microwave and while that helps keep the frig cold, it would be better for the interior temp. if it exhausted outside.

Just think how your car or truck A/C tends to not cool as well when it's very hot outside and the vehicle is stationary for an extended period of time due to the lower amount of air flow thru the condenser.
__________________

__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 07-27-2016, 03:53 PM   #16
2 Rivet Member
 
southjk's Avatar
 
Currently Looking...
2015 Interstate Grand Tour
midland , Texas
Join Date: Jan 2008
Posts: 44
Well the cooling issue on the nova Kool 3102 is looking up. Once i buttoned everything back up, and checked this morning it was 38f in the fridge , with coach temp of 84. The cold plate was -2f. Maybe it just took it a bit longer but it finally is overcoming the heat. Currently, the coach temp is 94. Inlet air at the bottom vent is 89f and the upper outlet vent is 102. As much as I hate receiving 102 Degree air into the coach at least the nova Kool is out running it. Fridge temp is holding at 40. When we go on the road next week in the mountains of ruidoso New Mexico we'll probably have to turn the thermostat up as highs will be around 80 or less. With everything that's been done I think the 1500 ohm resistor along with the vent fan did the trick.
__________________

__________________
southjk is offline   Reply With Quote
Old 07-27-2016, 04:38 PM   #17
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
Metairie , Louisiana
Join Date: Dec 2011
Posts: 9,089
Quote:
Originally Posted by southjk View Post
Currently, the coach temp is 94. Inlet air at the bottom vent is 89f and the upper outlet vent is 102. As much as I hate receiving 102 Degree air into the coach at least the nova Kool is out running it.
Do you have the MaxxFan vent open with the fan running (with a window cracked open elsewhere)? Extracting the hot air near the ceiling can only be a good thing
__________________
WBCCI #1105
TAC LA-4

Engineering: Finding complex solutions to simple problems you didn't even know you had.
Protagonist is offline   Reply With Quote
Old 07-27-2016, 07:47 PM   #18
2 Rivet Member
 
southjk's Avatar
 
Currently Looking...
2015 Interstate Grand Tour
midland , Texas
Join Date: Jan 2008
Posts: 44
Yes, I've had the vent fan open. Luckily it's located very near the fridge vent outlet. My hope is also that AS comes up with an external vent.
__________________
southjk is offline   Reply With Quote
Old 07-28-2016, 11:20 AM   #19
1 Rivet Member
 
2016 Interstate Grand Tour Ext
Galveston , Texas
Join Date: Aug 2012
Posts: 19
thanks for all your help

Thanks for those comments and suggestions - we will go on our trip and postpone dealing with this problem. We traded a 2013 AI to purchase this new Grand Tour - and of course we knew there would be something that would need to be tweaked, but I didn't plan on something of this magnitude. One of the features I liked best was the BIG fridge and freezer! We had no issues with the combo fridge/freezer in the old AI. In fact if we turned it up too high, we would have frozen lettuce, even in Texas. Maybe they need to go back to a combo unit.

BTW we did have bad batteries in the GT when we picked it up, and the dealership in Buda, TX did replace them for us. It was somewhat of an argument, but they did end up doing the right thing. We were armed with very good technical information, thanks to the nice people on this forum, on how to tell if the batteries were able to hold a charge or not. And thank goodness, the batteries were so damaged, it was easy to show they needed to be replaced.
__________________
galvestongrl is offline   Reply With Quote
Old 07-28-2016, 11:27 AM   #20
1 Rivet Member
 
2016 Interstate Grand Tour Ext
Galveston , Texas
Join Date: Aug 2012
Posts: 19
Quote:
Originally Posted by southjk View Post
Well the cooling issue on the nova Kool 3102 is looking up. Once i buttoned everything back up, and checked this morning it was 38f in the fridge , with coach temp of 84. The cold plate was -2f. Maybe it just took it a bit longer but it finally is overcoming the heat. Currently, the coach temp is 94. Inlet air at the bottom vent is 89f and the upper outlet vent is 102. As much as I hate receiving 102 Degree air into the coach at least the nova Kool is out running it. Fridge temp is holding at 40. When we go on the road next week in the mountains of ruidoso New Mexico we'll probably have to turn the thermostat up as highs will be around 80 or less. With everything that's been done I think the 1500 ohm resistor along with the vent fan did the trick.
Thanks for all this information! I guess we'll be doing the same things you have. It sounds like you are doing this upgrade yourself?? Did you go through your Airstream dealer to get the parts? I wonder if a 100 lb 62 year old woman (me) could do this repair?
__________________
galvestongrl is offline   Reply With Quote
Old 07-28-2016, 12:19 PM   #21
Rivet Master
 
InterBlog's Avatar

 
2006 22' Interstate
League City , Texas
Join Date: Oct 2014
Posts: 1,471
Quote:
Originally Posted by galvestongrl View Post
... I wonder if a 100 lb 62 year old woman (me) could do this repair?
I reckon you could do whatever you put your mind to. I'm not quite as old as you and not quite as small, but the Interstate has taught me to do things that I never would have attempted previously in my life. It's been a royal pain in the a$$ at times but there's also an immense feeling of satisfaction that comes from realizing my own expanded competencies. I learned major new stuff as a gray-hair. It's never too late to take on new challenges.
__________________
InterBlog is offline   Reply With Quote
Old 07-28-2016, 12:58 PM   #22
2 Rivet Member
 
southjk's Avatar
 
Currently Looking...
2015 Interstate Grand Tour
midland , Texas
Join Date: Jan 2008
Posts: 44
They did the mod in ft worth which is a 5 hr drive from where I live. Since I needed to do a lot of testing and it takes a while to know whether or not the refrigerator is working I did several tweaks myself with the guidance from the nova kool guys.
They sent me the 1500 ohm resister to replace the 500 ohm resister which was in the original mod.
It is a bit awkward removing the refrigerator , if you can, by all means let the dealership handle this. I've got a background in electronics so I didn't mind doing it.
__________________
southjk is offline   Reply With Quote
Old 07-29-2016, 12:51 PM   #23
4 Rivet Member
 
2016 Interstate Grand Tour Ext
Bellevue , Washington
Join Date: May 2016
Posts: 285
Coming late into this discussion . What is the resistor mod for? I know about the problem of the two units cooking the air behind them but what is the resistor supposed to do?
__________________
amirm is offline   Reply With Quote
Old 07-29-2016, 04:55 PM   #24
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,550
Quote:
Originally Posted by amirm View Post
Coming late into this discussion . What is the resistor mod for? I know about the problem of the two units cooking the air behind them but what is the resistor supposed to do?
I suspect it biases the compressor to run longer but that's just a guess.

Sounds like a real fix is exhausting the air from the condenser, preferably outside the RV.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 07-29-2016, 05:19 PM   #25
4 Rivet Member
 
2016 Interstate Grand Tour Ext
Bellevue , Washington
Join Date: May 2016
Posts: 285
Quote:
Originally Posted by 73shark View Post
I suspect it biases the compressor to run longer but that's just a guess.
Thanks. You reminded me that the schematic is in the manual and it shows this:



Seems to me the resistor controls the speed of the optional fan.
__________________
amirm is offline   Reply With Quote
Old 07-29-2016, 05:24 PM   #26
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,550
Doubt that'll help much based on someone's measurement of the exhaust temp of 102*.
__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Old 07-29-2016, 05:50 PM   #27
Figment of My Imagination
 
Protagonist's Avatar
 
2012 Interstate Coach
Metairie , Louisiana
Join Date: Dec 2011
Posts: 9,089
Quote:
Originally Posted by 73shark View Post
Doubt that'll help much based on someone's measurement of the exhaust temp of 102*.
The important thing is not the 102F temperature. It's the 13F temperature difference between inlet and outlet air. The same post that cited 102F at the outlet also cited 89F at the inlet, meaning they weren't running the air conditioner and it was already uncomfortably warm inside the van anyway.

If the A/C was on and the interior temperature was only about 75F, then the exhaust from the fridge/freezer coils would probably be closer to 88F, still more heat than one would like to have pumped back into the van, but not as extreme as the southjk experienced during his test.
__________________
WBCCI #1105
TAC LA-4

Engineering: Finding complex solutions to simple problems you didn't even know you had.
Protagonist is offline   Reply With Quote
Old 07-29-2016, 06:02 PM   #28
Rivet Master
 
73shark's Avatar
 
2011 Interstate Coach
Overland Park , Kansas
Join Date: Aug 2011
Posts: 2,550
If what you say is accurate, then does that mean that all of those reporting problems maintaining acceptable temps in the frig and freezer are not keeping the interior cool enuf?
__________________

__________________
Glass half full or half empty to an engineer is the glass is twice as big as it needs to be.

PM me for sale info on my 2011. SOLD!
73shark is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Nova Kool 12V Operation tlundell Sprinter and B-van Forum 43 07-19-2016 03:39 PM
Drip Tray in Nova Kool Refrigerator BillyBoy Sprinter and B-van Forum 0 02-06-2016 08:34 AM
Screens for 2015 Grand Tour tlundell Sprinter and B-van Forum 11 05-25-2015 08:37 AM
First trip in our new 2015 Interstate Grand Tour LizabethLane Sprinter and B-van Forum 40 10-29-2014 03:06 PM
Nova Kool anyone? byamcaravanner Refrigerators 8 09-24-2007 04:13 PM


Virginia Campgrounds

Reviews provided by



Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:59 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.