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Topic: Dometic Thermostat Issue (Read 545 times) previous topic - next topic

Dometic Thermostat Issue

Our daughter is using the coach for a few days about four hours from here while on a temporary assignment for her employer.  I took it up and left everything running. 

She called later to say the rear air wasn't working and didn't show up on the thermostat.  I gave her the reset instructions for the 5 button thermostat and she also found the rear AC breaker was tripped.  After resetting it all seemed fine.  She came back that night and zone 2 didn't show up on the thermostat even though both units were cooling. 

While ago she texted me that tonight when she returned it was 85 in the coach and the rear air wasn't working.  The breaker was fine. She reset the thermostat and set the rear air like she wanted it.  Both zones are now cooling, but zone 2 has disappeared from the screen again.

There may have been previous posts on this but I couldn't find one.  She is done with the coach Friday and we plan to use for this weekend.  We can't stay in it without both AC units.

I don't know if I should get a replacement part before going up there or where to look for a bad connection.

Does this sound familiar to anyone?

Thanks


Rick & Rhonda
2003 U320 4220  Build #6199
Was
91 36' GV 300 Caterpillar, 92 40' U280 300 Cummins, 97 36' U295 300 Cummins, 2002
U320 450 Cummins
(Guess we're hooked)

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Re: Dometic Thermostat Issue

Reply #1 –
Quote from: Johnstons –
I gave her the reset instructions for the 5 button thermostat and she also found the rear AC breaker was tripped.  After resetting it all seemed fine.  She came back that night and zone 2 didn't show up on the thermostat even though both units were cooling.

Rick,
 
Please share the reset instructions.
 
BTW, mine does not have a zone 2; it appears to be zones 1 and 3. Does that make any sense? Zone 1 is the front and works great except extremely LOUD. The bedroom does not come on and I assume it is zone 3. Will check for the circuit breaker and follow your reset instructions.
 
Thanks,
 
Trent
Trent and Jean Eyler
2000  U295  4003  WTFE  ISC  350
Build#5603 MC#17385

Re: Dometic Thermostat Issue

Reply #2 –
Take a good fan with you and blow the cold air thru coach. Much more healthy than air/con.
JohnH
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Dometic Thermostat Issue

Reply #3 –
It was 102F today in Houston with a heat index of around 114F.  I will stick with air conditioning.
Steve DeLange
2005 U320T 40'
Pearland, Texas

Re: Dometic Thermostat Issue

Reply #4 –
Since both roof air conditioners blow into a common duct, we usually find running just one a/c at a time in the other end of the RV is all we need. Not too noisy that way.  It might help that the Foretravel is well insulated and ours is a light color.
Tom Lang K6PG (originally  KC6UEC)
and Diane Lang
2003 38 U295 build 6209
2016 Jeep Grand Cherokee Summit Ecodiesel
still have tow-ready 2006 Acura MDX 
Temple City, California
Motorcade 16681 California Chapter President
SKP 16663 member of SKP Park of the Sierra, Coarsegold California
FMCA F071251
Retired electrical and electronic engineer

Re: Dometic Thermostat Issue

Reply #5 –
We have to run both roof airs when it is very hot out, just to keep up. In fact most of the time both are running when it is not real hot, with the rear usually cooling and turning off before front.

Re: Dometic Thermostat Issue

Reply #6 –
One unit got it down to 85. Blowing that "cold" air through the coach wouldn't quote cut it for us. I cleaned the coils about a month ago so that's all it's going to do. Our 320 is basically the same color as yours Tom.  It supposed to be 100 here today and as you know that is measured in the shade. The coach will be in the sun. 

Trent, I came pretty close to your place taking the coach up 44 then 75 to Dewey where it is now. It must have caught something from yours as I passed.  Here are the reset instructions.

To reset the Dometic 5-button thermostat:

Turn the ON/OFF switch to the "OFF" position.

Simultaneously depress and hold the MODE and ZONE

push-buttons and turn the ON?OFF switch to "ON".

"FF" should appear in the LCD display until the

MODE and ZONE push-buttons are released.

Rick & Rhonda
2003 U320 4220  Build #6199
Was
91 36' GV 300 Caterpillar, 92 40' U280 300 Cummins, 97 36' U295 300 Cummins, 2002
U320 450 Cummins
(Guess we're hooked)

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Re: Dometic Thermostat Issue

Reply #7 –
If you can keep the air moving, it will feel quite a bit cooler.  We have a ceiling fan over the bed and a small box fan for the front room.
Tom Lang K6PG (originally  KC6UEC)
and Diane Lang
2003 38 U295 build 6209
2016 Jeep Grand Cherokee Summit Ecodiesel
still have tow-ready 2006 Acura MDX 
Temple City, California
Motorcade 16681 California Chapter President
SKP 16663 member of SKP Park of the Sierra, Coarsegold California
FMCA F071251
Retired electrical and electronic engineer

Re: Dometic Thermostat Issue

Reply #8 –
Thanks, Rick. Does the "FF" have any meaning other than to let you know that you properly reset it?
 
Trent
Trent and Jean Eyler
2000  U295  4003  WTFE  ISC  350
Build#5603 MC#17385

Re: Dometic Thermostat Issue

Reply #9 –
Here is everything I know about this thermostat, thanks to Barry.

Duo Therm 5 Button 3109228.001 Troubleshooting

Daughter said the AC is now working fine but the thermostat is intermittent.  I suppose it must be a loose connection somewhere.

I look forward to meeting you and seeing your coach someday soon.
Rick & Rhonda
2003 U320 4220  Build #6199
Was
91 36' GV 300 Caterpillar, 92 40' U280 300 Cummins, 97 36' U295 300 Cummins, 2002
U320 450 Cummins
(Guess we're hooked)

The selected media item is not currently available.
 

Re: Dometic Thermostat Issue

Reply #10 –
Quote from: Johnstons –
Here is everything I know about this thermostat, thanks to Barry.

Rick,
 
Thanks for the link. Guess I need to spend more time on Barry's site.
 
Trent
Trent and Jean Eyler
2000  U295  4003  WTFE  ISC  350
Build#5603 MC#17385