Free 7 Day Trial RV GPS App RV Trip Planner Campground Reviews RV Maintenance Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > THE OWNER'S CORNER FORUMS > Newmar Owner's Forum
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
 
Thread Tools Search this Thread Display Modes
 
Old 04-30-2021, 09:56 PM   #1
Junior Member
 
toddspeed's Avatar
 
Join Date: Apr 2021
Location: Atlanta, GA
Posts: 10
Eplex, HVAC, and 5 button controller option

Resurrecting this thread from the dead:

https://www.irv2.com/forums/f103/06-...-280978-3.html


I just purchased an 06 Essex (eplex) and only had one HVAC unit (zone 4) working when I got it. 90 deg sunny day here at Daytona Speedway and it was getting unbearable. I had purchased the 5 button controller after reading the thread linked above and had been meaning to try it as a means of troubleshooting since two of my room thermometers were reading 50deg or more off (one is pegged at zero). I wasn’t sure what the issue was but fans wouldn’t run nor would any other mode work in zones 1 and 2.

I plugged RJ cable above the driver into the 5 button controller and got code EE, which from another thread I found I needed to hold the mode and zone buttons while turning the controller on. Then boom I was able to get all 3 zones working properly for the first time.

Which still begs the question as to why they weren’t working on eplex. I suspect the 2 room thermometers that are reading incorrectly could have something to do with it? But even the fans wouldn’t run before which I think have nothing to do with thermometers. Possibly need to repair the RJ connectors at the roof units themselves? If so not sure why the 5 button allows them to work properly thru the same RJ connection.

It does seem like the temperature is now controlled by the 5 button. I had it in the upper cabinet above the driver and it was quite warm up there. The ac stayed on well below the set point. When I moved the 5 button out of the cabinet into the room air, all 3 ac shut off within a few minutes. So it seems like the 5 button controller is also acting as a single room thermometer for all 3 HVAC zones. Which is better than nothing but doesn’t really “zone” the coach anymore if you wanted the bedroom colder than the living area, for example.

Or is all this simply the sign of an eplex system on its way out? All other functions seem to work great. Do I neeed to just get new room thermostats for eplex or is it the RJ connectors on the roof or both?

Anyway, huge thanks to whoever figured this out!
toddspeed is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-01-2021, 09:31 PM   #2
Senior Member


 
Join Date: Dec 2014
Location: Salt Lake City, UT
Posts: 643
Your eplex is old, obsolete and on its way out. I replaced mine several years ago. Recommended.

You are correct that you now have a 1 zone system. The eplex temp sensors are not used by the dometic controller. You will need to add 3 more dometic sensors to get the 4 zones to work again. See my posting history for details.

If the new controller is working, then the rj connections are fine.

Good luck. Once eplex is removed, your coach will work fine.
__________________
2006 Newmar Essex 4502
2015 Jeep Grand Cherokee
azSkier is offline   Reply With Quote
Old 05-01-2021, 10:01 PM   #3
Senior Member
 
DandyDon's Avatar


 
Newmar Owners Club
Join Date: Oct 2016
Location: PA,Mt or AZ
Posts: 349
In reading this and other related threads, and checking my coach's controllers, it appears I do not have the eplex system in my 05 Essex. No touchscreen anywhere that I can see, but then again, I don't even know what I'm looking for??
__________________
2005 Newmar Essex 4502
500 hp Cummins
2005 Dodge Ram 1500 Toad
DandyDon is offline   Reply With Quote
Old 05-01-2021, 11:37 PM   #4
Senior Member


 
Join Date: Dec 2014
Location: Salt Lake City, UT
Posts: 643
2006 was the first year for eplex. Todd needs to make his essex operate like yours.
__________________
2006 Newmar Essex 4502
2015 Jeep Grand Cherokee
azSkier is offline   Reply With Quote
Old 05-02-2021, 03:58 PM   #5
Senior Member
 
DandyDon's Avatar


 
Newmar Owners Club
Join Date: Oct 2016
Location: PA,Mt or AZ
Posts: 349
Quote:
Originally Posted by azSkier View Post
2006 was the first year for eplex. Todd needs to make his essex operate like yours.

Gotta feel badly for Todd, but I'd say it's good news for me. It's been 5 years that we've been spending eight months or so a year in a motorhome and I haven't even begun to scratch the surface as far as a learning curve. Most everything I do know I've learned here!!
__________________
2005 Newmar Essex 4502
500 hp Cummins
2005 Dodge Ram 1500 Toad
DandyDon is offline   Reply With Quote
Old 05-03-2021, 06:58 PM   #6
Junior Member
 
toddspeed's Avatar
 
Join Date: Apr 2021
Location: Atlanta, GA
Posts: 10
The plot thickens.

I found a binder with sooooo much e-plex info. It looks like it was a factory presentation back in the day. It has hand written addresses and clock info and where each module is located.

I figured out I have 3 bad modules. One for fresh water tank level, one for hvac interface, and one for zone 1 thermometer.

Looks like if I replace those 3 modules it will all be back up and running!
toddspeed 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
Essex HVAC ePlex to Dometic Conversion R.E.D. Newmar Owner's Forum 19 06-20-2021 11:39 AM
Leaving Eplex for Dometic 5 Button Dave.O Newmar Owner's Forum 50 01-15-2021 08:22 AM

» Featured Campgrounds

Reviews provided by


All times are GMT -6. The time now is 09:15 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2021, vBulletin Solutions, Inc.