Forum Discussion

Weldon's avatar
Weldon
Explorer
Sep 05, 2020

E-1 Message on Dometic thermostat

My 15 btu dometic a/c has quit working. I have a message on the thermostat E-1. Need help identifying this problem. Montana is parked in the country and plugged into 50 amp. Think there was a lighting strike near by because some breakers were off.
Second question, I pulled the start capacitor which is not swollen and there is no burned electrical smell. Plugged into top of capacitor is a small device labeled Motor Starter. The connector attached to this did show signs o0f being too hot.
What does E-1 on the thermostat indicate?
How does one test the capacitor?
How does one test the peice labeled Motor Starter #Awsx-7?

Thanks!
  • Weldon's avatar
    Weldon
    Explorer
    Sep 07, 2020
    Doug the control box and this thermostat were installed about 10 years ago, guess the shop had this one in stock. Is there going to be a fuse in the control box that I should look for?
    Thanks
  • dougrainer's avatar
    dougrainer
    Nomad
    Sep 07, 2020
    Weldon wrote:
    https://www.ganderoutdoors.com/dometic-single-zone-lcd-thermostat-with-control-kit-polar-white-109082.html?g

    Doug this is like my tstat, hope it will open for you.

    1. That Tstat was not even available 16 years ago
    2. That means someone upgraded the Control box and the wall tstat in the past 16 years.
    3. There are only 3 wires that connect to this Tstat. So, look at the back of the tstat and then go to the Upper AC control box and find those 3 wires and make sure they are connected. Doug
  • Weldon's avatar
    Weldon
    Explorer
    Sep 07, 2020
    https://www.ganderoutdoors.com/dometic-single-zone-lcd-thermostat-with-control-kit-polar-white-109082.html?g

    Doug this is like my tstat, hope it will open for you.
  • Weldon's avatar
    Weldon
    Explorer
    Sep 06, 2020
    Doug I don't have the model number of the AC but it is NOT the Penguin Low Profile.
    Will be a few days before I can get back to the trailer. Appreciate your help and will try the reset when I get there.
  • dougrainer's avatar
    dougrainer
    Nomad
    Sep 06, 2020
    How do I reset my Dometic 5 button thermostat?
    Once the new cable is plugged in do a reset on the 5 button control center (hold the Zone and Mode buttons down while turning on the 5 button control center. You will see the letters FF and once you release the Zone/Mode buttons you will then see Zone 1. IF that does not do the trick, then the COM cable between the Tstat and roof AC has a problem. Need Model of roof AC. Low Profile? Which is a Penguin. Doug
  • Weldon's avatar
    Weldon
    Explorer
    Sep 06, 2020
    2004 2955 RL Montana, Dometic and a 5 button I think. Just one unit. I tried to post a picture of the thermostat.
    Think it is a single zone thermostat, on the bottom of the stat, wording On/Off, on right side, t and -, on the left side, Cool-Fan-Furnace. Thanks!


    https://www.bing.com/search?q=reset+dometic+rv+thermostat&FORM=R5FD7
  • dougrainer's avatar
    dougrainer
    Nomad
    Sep 06, 2020
    Need Year/Brand/Model of RV. Do you know WHICH Dometic Tstat you have? CCC 4 button CCC 5 button CCC2
    2 AC units or just one?
  • Weldon's avatar
    Weldon
    Explorer
    Sep 05, 2020
    Thanks Doug, I tried Off and Zone (zone meaning fan-cool-furnace) but did not get the "IniT" message. What is Mode?
    Is there a fuse inside the control box? Seems I read something on this.
  • dougrainer's avatar
    dougrainer
    Nomad
    Sep 05, 2020
    NO communication at the AC control Board to the wall tsat. Doug


    First, reset the CCC2 using the Dometic “System Reset Procedure” (see NOTE below):
    • Press OFF .
    • Press ZONE and MODE at the same time. The CCC2 screen will display the “IniT” screen which
    will list all the available Zones:

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