I was exercising my Aqua Hot and cant get the bedroom zone to work. On the 5 button control I don't see a separate bedroom control. when the furnace is selected on the control on zone 1 does this set the temp. on the bedroom as well?
Ask Rudy Legett! Awesome AH repair guy.
Michelle of Michelle and Steve keeps a rubber mallet close at hand is known to give things a thump now and then. You might try that! Stuck valve maybe?
My Aqua Hot system uses the #2 setting for the bedroom, heating or cooling, no need for a hammer. Also #1 is for the front end/kitchen area, bathroom is on the manual thermostat in bathroom, also there is a thermostat in the water bay you can tweak.
And do not forget the engine heat part of the Aqua Hot too.
Dave M
Ours is also as Dave described. On the 5 button control we select Zone 2 for the bedroom area, set the Mode to Furnace, and adjust to desired temperature (you might have to set this pretty high if the ambient temperature is warm).
I can jump the relay on the aqua hot and get it to work but not via the thermostat. I am familiar with the aqua hot operation but not sure what Foretravel and the 5 button control relationship. I suspect a control wire or sensor issue in the bedroom. Does anyone know what the #s should range on the ohm meter?
Phil, I do not have Aqua but I think the controls on wall are same and to select the bedroom setting you have to press the 2 top buttons at the same time to get the next zone, then you can make your settings for that area.
John
When I go to zone 2 there is no option for furnace?? Guess that my be the issue? Last year when we used it every thing was new and I am not sure if the bedroom was operating or not.
Phil
Every coach is setup slightly differently.
How many thermostats do you have in your coach and what type are they?
How many roof A/C units?
- Roger Berke -
If the rear ac was replaced maybe the furnace dip switch did not get turned on or if someone converted from 4 button to 5 button when the upper board was replaced the furnace dip switch did not get turned on. That is access by removing the upper shroud and then on the passenger side of the coach there is a metal panel about 6 inches square that can be removed by takng out 2 screws that take a 5/16 hex head to see if the furnace dip switch is turned on. Please turn off power to the rear ac before working on it to prevent being shocked.
I have two ac units and a 5 button thermostat control.
That is access by removing the upper shroud and then on the passenger side of the coach there is a metal panel about 6 inches square that can be removed by takng out 2 screws that take a 5/16 hex head to see if the furnace dip switch is turned on.
Where is the shroud?
Your thermostat should look like photo in attachment.
To change zones, push "Zone" button. The zone number that is flashing is the zone that you are in.
The photo is from my coach. 3 A/C + 3 Heat zones. You may only have 2 zones.
- Roger -
Yes that is the control like mine but when I toggle through on zone 2 there is no option for the furnace?
How about furnace on zone 3?
What zone is your rear A/C unit on?
- Roger -
No zone 3 appears and zone 2 is the bedroom.
Phil
Has the rear heat EVER worked since you owned the coach?
Is there a simple wall mount thermostat in the bathroom?
- Roger -
Good question as to wether it ever worked. I cant say. We live in Miami and we did a trip to New England last year and going again this year. WE where learning allot we had just purchased it and cant say for sure if it worked or not but I suspect it did not. There is a control in the bathroom and it is fine.
Phil
What does the thermostat in the bathroom control?
- Roger -
The bathroom
Phil
This gets real tough from here. I am going to have Art Twaddell take over. He knows a lot more than I do about the Dometic thermostats work. He is a Dometic dealer.
It could be that when your coach was switched from (original) 4 button thermostat to your new 5 button thermostat it was not properly wired.
Basically, the control board inside the cover of the roof mounted A/C (on the roof), controls the Aqua-Hot. There are DIP switches on this board that need to be properly set. There is a wire that goes to the Aqua-Hot to send a command to turn on the (rear) heating zone. I think you have a problem with the thermostat / wiring / setup.
- Roger -
Thanks, I am sure it is a control issue. look forward to FOT to open and talk to service for tec support. The good thing is all the systems work it is just a control issue.
You might try resetting the thermostat control:
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.
I am sure you are aware that to get the system to work you first select the zone. The flashing number is the zone you are in. Zone 2 is for the bedroom. Select the mode button and select furnace or what ever for your heat. Adjust your temperature next. Now the important part. You must make sure that zone 1 is on the same mode (furnace in this case) as zone 2. If the two zone modes are not in sync, it will not work. Hope this helps.
Thanks for the replies. I tried the reset but still no option for furnace in zone 2
Are the dip switches
in the wall control on the roof unit set correctly?
See Comfort Control manual below (assume this is the right one), or as found in the Files section thanks to Barry B.

Michelle
edited to correct location of dip switches - thanks Roger!
The DIP switches are on the control board that is on the rooftop unit. You have to get on the roof and remove the cover from the A/C unit to access them.
It is very possible that that is the problem. Art Twaddell knows how they should be set. I sent him an email alerting him to this thread that needs his expertise.
- Roger -
Thanks Steve, I was looking on Dometic web sight for the pdf you posted with no luck. I think this will be the ticket. sounds like a dip switch. I will let you know.
Thanks Phil
I checked the dip switches and found zone 2 off. I turned it on and i get a EE on the panel. I tried re-setting the control but it goes back to EE with the #2 zone on on the dip switch. I am thinking a wire may be incorrect somewhere?
Phil
I called Art Twaddell and kicked him in the shins about responding. He is out working on job. When he gets back he will make posting to let you know what the DIP switch settings should be.
- Roger -
Thanks Rodger
Phil: Sounds like you did everything right # 2 AC unit dip switch # 5 needs to be on, When you get EE display, Disconnect the communication cables on #2 AC and do a reset, Does it still has an EE ? Now reconnect,and do a reset, now if EE is still there it either has a bad communication cable or a bad control board. Art's Mobile R.V. Service (http://www.artsmobilervservice.com) if you want to talk phone # on website Art
Art, It was the rear circut board dip switch setting. It is working!! Thank you so much for the help! Now I need to see why the diesel did not fire! This is new and unrelated. I will order a fuel nozzle on Tuesday and go through it.
Thanks for all the help! This forum group is great!! ;D
Phil
Carefully check the fuel lines that feed the Aqua-Hot for cracks in the hose right at the brass fittings. 3 locations - both connections on fuel filter under drivers seat and supply that connects to the Aqua-Hot bulkhead fitting. Some of the 1999, all of the 2000 and some of the early 2001 coaches have the problem shown in the attached photo. When Foretravel built the coaches, they used 5/16" ID fuel line and 3/8" barbed fittings. They work fine until the hose gets brittle and cracks. Fix is to trim fitting and about 1 inch off of hose. Install correct fitting and reinstall. I have fixed a BUNCH of them.
Read more, here: HELP! - Freezing temps and Diesel heat (Aquahot) does not seem to start! (http://www.foreforums.com/index.php?topic=11547.0)
- Roger -
Thanks, I will check the fuel lines. Thanks for referring Art (prevostart). Art was professional and to the point. Nice dealing with some one with a brain!
Phil
You are welcome. Art is a great guy. He lives in the San Luis Obispo / Pismo Beach, CA area. I always recommend that anyone that has a service need in his area contact him. He works on almost anything on the coach. I specialize in working on Aqua-Hot heaters and Webasto burners.
There is lots more information on my Forum, here: http://www.Forum.RVHydronicHeaterRepair.com (http://www.Forum.RVHydronicHeaterRepair.com)
- Roger Berke -
2000 Foretravel U320 42'
Roger/Phil : Thanks' guys for the kind words. Art's Mobile R.V. Service (http://www.artsmobilervservice.com)
Rodger, When you replaced the fittings did you use pressed fittings or just hose clamps w/barbed fittings? Mine have cracks and I plan on changing them.
I just replaced some on a (2001 Foretravel) coach this morning.
I use brass barbed fitting and worm drive stainless steel clamps.
I have a few of the fittings if you need them contact me. They are real hard to find.
Hose is normally long enough to trim about 1 inch to 1.5 inches from hose. New connectors and clamps. Looks like photo below when done.
- Roger -