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!

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:

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.

Need Year/Brand/Model of RV. Do you know WHICH Dometic Tstat you have? CCC 4 button CCC 5 button CCC22 AC units or just one?

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

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

E-1 Message on Dometic thermostat | Good Sam Community

Weldon
Explorer
Nov 18, 2020
Follow up on the E-1 problem. Was able to install the thermostat and new control board. Everything works good as it should. Decided not to try the new thermostat with the old control board. felt it would be better to keep the new items together for compatible sake. Probably my imagination but it seems the fan speed is greater whether on low or high speed.

Thanks Doug for the advice in solving the problem.
dougrainer
Nomad
Oct 20, 2020
Weldon wrote:
Doug, I have received the new Tsat and control board. Will go out in a few days to install. Would it be a bad idea to connect the Tstat to the old control box first.
If the unit came on then I would know if the Tstat was the issue. Thanks

Good idea. Doug
Weldon
Explorer
Oct 20, 2020
Doug, I have received the new Tsat and control board. Will go out in a few days to install. Would it be a bad idea to connect the Tstat to the old control box first.
If the unit came on then I would know if the Tstat was the issue. Thanks
Weldon
Explorer
Oct 06, 2020
Doug I will take your advice and order the complete kit.

Thanks
Weldon
Explorer
Oct 06, 2020
Doug I will take your advice and order the complete kit.

Thanks
Weldon
Explorer
Oct 06, 2020
Nothing attached to wall.
time2roll
Nomad
Oct 06, 2020
Possibly check wire continuity with an ohm meter before you spend money.
Although it is rare for a wire behind a wall to suddenly have an issue. Have you attached anything to the walls lately?
dougrainer
Nomad
Oct 06, 2020
Since you are doing the work yourself, I would buy the complete Kit(Tstat and control Board) for $95. The tstat alone is $57. Doug

https://www.rvpartscountry.com/Dometic-Single-Zone-LCD-Thermostat-Control-Kit-Black_p_25652.html?gclid=CjwKCAjwq_D7BRADEiwAVMDdHmeshKBXArjlOTTDJcwoSumIlZJHeRmjzU5Wm22XojB7idPwdNlDUBoCbbUQAvD_BwE
Weldon
Explorer
Oct 06, 2020
Still have the E-1 showing on my thermostat and have tried removing thermstat then remove COM cable and wait 2 minutes then go to reset which made no difference. Still have E-1 flashing. All wiring is connected in the control box. If the thermstat is flashing the message I assume it is good. Wires on the a/c compresser are connected. How do I determine if control box is defective?
Dometic 15000 model 59516.531, serial number 40335444. Another number which may have been labeled product no. 991731786. Thanks!
dougrainer
Nomad
Sep 07, 2020
IF you have a LCD display, the fuse is good. Doug

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E-1 Message on Dometic thermostat

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