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Old 08-06-2016, 01:36 PM   #1
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A/C not working- possibly thermostat

Our A/C quit working- both units.
I suspect the thermostat.
The Dometic CCC2 (?) thermostat was displaying an error message E1.
When attempting to reset, zone 1 and 2 went away and it shows zones 2 and 4 but will do absolutely nothing.
The owner's manual is no help.
I suspect the thermostat or mother board. I suspect there is no "communication" between the thermostat and A/C units.
I wonder if there is a better way.
1 thermostat for 2 units is a fatal design flaw in my opinion.
Having a programmable thermostat in a camper is just stupid in my opinion.
Is it possible to have 2 simpler thermostats?
All I need is the old timey kind like on a home system- heat, air, fan, temperature- simple on/off.
Simple- bi-metal spring and a Mercury switch-
I want 2 separate thermostats so that when the one thermostat quits you don't lose both A/C units.
The bedroom needs its own.
The living room needs its own.
Is it possible to install 2 less complex more reliable thermostats with the Dometic units?
As it is, we are cutting our trip short and going home.
Not a thing I can do about it today-
As with everything about a camper that quits, breaks, or fails, you never discover it until Friday night or Saturday afternoon.
I have no clue how to proceed except to try to get to an RV dealership.
I am geographically challenged.
There is no RV dealer or repair shop for 100 miles.
Also, I work-
I work at the same time the dealerships are open for business.
So I may have to schedule an appointment and take off work.
The dealers never have parts on hand and have to order.
They want you to drop off your trailer and leave it for 2 weeks.
I can't be without the trailer that long.
The nearest Airstream dealers are 4-5 hours away.
So I would make an 8-10 hour round trip to drop off the trailer, then the same 8-10 hour round trip to pick up the trailer and have to cancel a couple of events.
I might have to take off and go to Jackson Center, where they will have parts on hand and will fix it while I am there camping in the Terraport.
Thoughts?
Advice?
Wisdom?


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Old 08-06-2016, 02:37 PM   #2
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There is NO reason to have to take it to an Airstream "stealer" unless it is under warranty. Any RV dealer that has a qualified shop can fix it. It first sound like a programming error if it is showing units 3 and 4 while you only have 2 units.

You might call the AC maker and see if they have instruction they can e mail you and you might be able to reprogram it.
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Old 08-06-2016, 02:42 PM   #3
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Depending on exactly which Dometic units you have, you may be able to replace the CCC-II thermostat and control systems with individual Dometic 'Single Zone Thermostat' systems.

These would give you a digital thermostat for each unit, along with furnace control from one of the units and heat pump control for both.

You will need the complete kits (if they are compatible with your units) as each unit will need the new thermostats and control boards that go with them.


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Old 08-06-2016, 02:46 PM   #4
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Not sure how you reset your thermostat, but you could try unplugging the telephone cord connection on the back of the thermostat, if you didn't already do this?? Pull the thermostat carefully off the wall, then unplug the cord for a minute or two. I figured it maybe worth a try for your situation. Thats how a tech at JC told me to reset my thermostat, on my 2016 FC.
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Old 08-06-2016, 02:54 PM   #5
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I will try that.


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Old 08-06-2016, 02:59 PM   #6
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ALL RV dealers are a rip-off as far as labor rate, and there are none for 100 miles.
The only somewhat reputable RV repair shop is still 80-90 miles away.
All would require an appointment or leaving the trailer.
I will still have to take off work to tend to it if I don't figure it out.
91 degrees here...


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Old 08-06-2016, 03:05 PM   #7
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OK, guys...
This is getting stranger...
I took the thermostat off the wall and unplugged the telephone cord and plugged it back in.
The living room a/c came on... But on Zone 4!
Wth?


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Old 08-06-2016, 03:08 PM   #8
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It won't turn off.
It will not show the bedroom unit- only zone 4-
None of the switches do anything...
But the living room a/c is blowing- regardless of what button you push...
I still suspect a bad thermostat...
Monday I will try calling Airstream, dealers, and Dometic.


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Old 08-06-2016, 03:36 PM   #9
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Here is the procedure for resetting with an E1 error code:

https://rvseniormoments.files.wordpr...r_recovery.pdf

Sorry, the insert link function is not working.

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Old 08-06-2016, 04:36 PM   #10
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Tried that several times.
Nothing works.
Error code is gone.
It shows zone 4.
None of the buttons will do anything.


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Old 08-06-2016, 05:33 PM   #11
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Can't help with specifics but share your pain!

We only have one AC but have had a lot of control problems with it. At the moment it is ok!

I did find a troubleshooting guide someplace on the internet for that thermostat control - I think ours is the same as yours, it is a five button control. I'm sure you could find it with a google search if you don't already have it

Initially when we had problems I found whitish corrosion on the back of the thermostat circuit board. Cleaning it with alcohol and Q-tips got things working again.

A year or two later I started having more erratic problems. This time it seemed associated with the connecting cables or the female-female cable splice adapters that they plug into under the AC grille.

I had one spare connector hanging down (for a second AC unit if used I believe) so I switched and plugged the cable from the thermostat into the second unused one instead and things started to work!

It has been that way ever since and still working!

My feeling is that those cheapie telephone-type connectors might not be the best for this sort of service. I'm hoping I don't have further problems!

One thing to note if you consider trying to replace the cable to thermostat is that it looks like a standard four wire phone cable - but it is not. The plug at one end needs to be reversed 180 degrees on the cable compared to the plug at the other end. It is a data cable.

I learned that from Lew who give me several very helpful tips!

I am not sure if the cables that run up from the hanging connectors through the ceiling and up to the control board on the AC are reversed the same way or not - maybe Lew can comment if he happens to read this!

In any event I now carry spare cable, phone type terminal jacks to crimp on, and the special tool to connect the terminal jacks to the cable with me just in case I have further problems and need to mess around trying to make replacement connecting cables on the road! Hopefully having this equipment along will ensure I never need it - usually i goes that way!

I think the cheap little female - female cable splice connectors under the inside grille can be suspect also, and I carry a couple of spares of them.

Beyond that I have considered buying a spare control board and thermostat to carry with me. Last I checked they are still available. But they are about $100 each on line I think and I have not done that yet!

Good luck! Like you I wish they would just keep these things simple for us poor owners!

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Old 08-06-2016, 05:40 PM   #12
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I suspect both units can be downgraded to a simple mechanical thermostat. The bad news is the Dometic mechanical thermostats are terrible. I am using a 35 yr old coleman thermostat that came on the unit that came with the trailer and all my problems went away. There is no reason it could not be hot wired with a simple switch till you get it sorted out. It would be all or nothing. Open some windows to adjust temp and watch out for freezing up if running 100% of the time.

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Old 08-06-2016, 06:38 PM   #13
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m.honey, on the first night of our maiden voyage last winter, were in a friend driveway w/SP. I turned on the furnace, the gas fired, then the AC fired.

I noticed in the manual two references to hard boots to the factory defaults. Ours in a 2014 so the CCC2 stat may not be the same.

This operating instruction I just picked up off the web and is a bit different in page display. The system re-set is on page 11. On my manual it is on pages 4 & 20 but contains the same procedure.

It worked for me...we had heat that night...without the AC. I should also say we have never used the HP for either heat or AC mainly due to the noise, but plan to dive in on our fall trip to MO.

Bob
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File Type: pdf Comfort-Control-Center-ii-operation-manual_17586.pdf (1.32 MB, 32 views)
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Old 08-06-2016, 07:14 PM   #14
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I hate electronic control boards on things! Maybe you could hire a local AC heating tech to convert the AC units to simple individual thermostats? Kinda hard to find one who really knows what to do but tell them you won't pay until the job works like you want. Unfortunately here in California you can't buy a thermostat with mercury contacts anymore! The mechanical ones work good if you keep the contacts clean though, I check mine for lint once or twice a year.
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