Zone 2 Air Conditioner is not working

[jannlanz]

Hello,
I have a Dometic 3109228.001 5 Button Comfort Control Center that runs our heat and air conditioner. Zone 1 is working, but Zone 2 only gives a blank screen and won't allow me to choose any settings. Does anyone know what the problem could be? Thank you so much.

[Snomas]

I had the same problem and to correct I replaced the J11 4 wire snap connectors @ the front AC and rear AC units. It normally is a corrosion problem w/ the J11 connectors because they sit where there is moisture up inside of the AC units.

[MountainAir05]

jannlanz wrote:
Thank you MountainAir05. Do you have the link to page 9 of the manual? Thanks!

will try this again.

http://www.dometic.com/b3056cd0-1a5b-4a15-8c1f-1d322d4ac84d.fodoc

[jannlanz]

Thank you MountainAir05. Do you have the link to page 9 of the manual? Thanks!

[MountainAir05]

here is a manual that will help. On page # 9 I think, it shows a phone connector and wire.. that sends a signal from A/C #1 to #2, if not contact as in corrosion, then no control. To clean take a old tooth brush clean both ends. Spray with electrical contact clean and use di-electrical grease, Autozone has it.

[jannlanz]

Do you know how to remove the control panel? I pulled and tugged a bit, but it wouldn't just pop off so I didn't want to damage it. Thank you!!

[jannlanz]

We bought the RV new, so I'm sure we have the wiring diagram somewhere. Thank you so much for your help.

[paulcardoza]

Sounds like a probable bad/broken connection problem from the T-Stat for zone 2. Not a fun problem to diagnose. Do you have the wiring diagram for your coach and a multi-meter? Time to go hunting. 😞

jannlanz wrote:
Thank you for the information. I followed your instructions and FF did appear. I was able to set Zone 1, but now Zone 2 has disappeared completely from the panel. Previously, Zone 2 showed up but did not allow me to make a setting.
Thank you.

To Paul and Sandra: Zone 2 originally worked fine when we purchased the RV.

[jannlanz]

Thank you for the information. I followed your instructions and FF did appear. I was able to set Zone 1, but now Zone 2 has disappeared completely from the panel. Previously, Zone 2 showed up but did not allow me to make a setting.
Thank you.

To Paul and Sandra: Zone 2 originally worked fine when we purchased the RV.

[paulcardoza]

Did it work previously and has stopped working?

jannlanz wrote:
Hello,
I have a Dometic 3109228.001 5 Button Comfort Control Center that runs our heat and air conditioner. Zone 1 is working, but Zone 2 only gives a blank screen and won't allow me to choose any settings. Does anyone know what the problem could be? Thank you so much.

[MountainAir05]

Try this but first ensure that a breaker is not thrown.

2. System Reset

a. Turn the ON/OFF switch to the "OFF" position.
b. Simultaneously depress and hold the MODE
and ZONE push-buttons while turning the ON/
OFF switch to "ON". FF should appear in LCD
display until the mode and zone push-buttons
are released.


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