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03-18-2014, 09:03 PM
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#1
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Weekend Camper
Join Date: Feb 2014
Location: Texas
Posts: 10
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AC running when on furnace
We have a 2013 Z-1 with a 13.5 AC. It has a Dometic digital thermostat. When I flip it to furnace and set the temp say on 68. The AC will run and blow cold air. Now the furnace will kick on and blow warm air as well.
I am new to the travel trailer space -- we had a popup previously -- so I am unsure as to if this is normal behavior.
Any help would be appreciated.
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03-19-2014, 01:13 AM
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#2
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Full Time Camper
Join Date: Oct 2012
Location: Saskatchewan
Posts: 844
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Seems odd the AC would run when it is set to furnace. My first thought was that it was on automatic and you were setting the temp below the interior temp and the air conditioning cut in to bring the temp down. This almost makes me wonder if the wires are crossed somewhere. If you have a heat or cool setting and the air conditioning runs on heat there is something wrong. Obviously not completely backward given that you said the furnace kicked on and blew warm air.
Did your AC just cut in temporarily? or did it stay on for awhile? Just trying to get a better idea what is going on. Do you have the model of your thermostat?
The only other thing I can think of without knowing your thermostat model is that sometimes the AC fan will turn on to help circulate air in the RV while the furnace is running.
__________________
Scott
2013 CrossRoads Cruiser Patriot CF345RF
2011 Ford F350 Lariat FX4 CC 6.7L Turbo Diesel (Heavily Modified)
Saskatoon, SK
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03-19-2014, 06:12 AM
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#3
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Full Time Camper
Join Date: Mar 2013
Location: United states of america
Posts: 1,570
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It helps to dry out anything wet inside also. My 300BH has the digital thermostat (not sure if it is a dometic) and does the same thing, but sporadically.
I'd love to know how to set it to run the AC with Heat and the ability to turn it off/on...
I'd call Customer support. Last year I believe was the first year for the digital thermostats from the factory. During our walkthrough on our 2013, the dealer tech couldnt figure out the thermostat either...just never got around to calling customer service.
__________________
2017 Ford F350 Super Duty 6.7 King Ranch Crew
Sold the 2016 Crossroads Sunset Trail Grand Reserve 32BH
2020 Grand Design Momentum 320G
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03-19-2014, 06:15 AM
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#4
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Weekend Camper
Join Date: Feb 2014
Location: Georgia
Posts: 36
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I have a 2010 Kingston with 2 AC units. On one of my first trips in the camper over New Years I decided to run the fan on the bedroom unit for noise while also having the furnace on. To my surprise the fan would not come on with heat selected on the dual zone thermostat. After inquiring about this with my dealer, I was provided with documentation stating that this is the way the system was designed. The bottom line (at least for my system) is that if heat is selected, neither one of the AC units or fans will operate.
Randy
Jonesboro, Georgia
2011 Chevy 2500HD 4X4 Duramax/Allison
2010 Kingston 35SB
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03-19-2014, 06:24 AM
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#5
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Family Vacation Member
Join Date: Sep 2012
Location: Ontario Canada
Posts: 200
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Mine did the same, if you read the manual it can be changed . I believe by changing the fan setting to low from auto. It runs both fans on heat setting for better circulation. Sorry I can't access my manual as it is snowed in right now.
__________________
2012 Z1 271BH
2009 F150,4.6 3V. 3.73LS,9.75"
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03-19-2014, 08:51 AM
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#6
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Full Time Camper
Join Date: Feb 2013
Location: Connecticut
Posts: 688
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Make sure your fan is set to auto. If you have the fan on anything but auto it will blow cool air from the ceiling, while your furnace blows hot air from the floor.
__________________
Jason & Wendy
2014 Ford F-350 Lariat 6.7L PSD
2015 Keystone Montana 3711FL
B&W Patriot 16K Fifth Wheel Hitch
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03-19-2014, 09:38 AM
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#7
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Family Vacation Member
Join Date: Feb 2013
Location: NW Indiana
Posts: 151
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Our SF32RL does the same. Its been designed / set to 1st go to "Heat Pump(A/C)" for heat, then LP furnace. Checks for demand; outside temp; Elect. Power available; w/ low volts will still run fan w/o compressor; . . .
Only has been a problem when using generator instead of shorepower. 2nd attempt at cycleing compressor defaults to fan & furnace.
Fireplace Elect Heat has no problem w/ generator & generator doesn't mind Fireplace.
__________________
Sunset Trail SF32RL
2nd Misstress
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03-19-2014, 10:19 AM
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#8
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Full Time Camper
Join Date: Apr 2011
Location: Canton, OH
Posts: 937
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CW3 is correct. With Dometic thermostat, fan must be on "AU" (auto) or a/c fan comes on with furnace.
__________________
Eddy & Brenda
Canton, OH
2015 Silverado HD 6.0L
2014 Zinger 32QB
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03-19-2014, 01:09 PM
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#9
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Full Time Camper
Join Date: Mar 2013
Location: United states of america
Posts: 1,570
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This is so awesome..thanks for the posts..now I don't have to call customer service.
__________________
2017 Ford F350 Super Duty 6.7 King Ranch Crew
Sold the 2016 Crossroads Sunset Trail Grand Reserve 32BH
2020 Grand Design Momentum 320G
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03-19-2014, 01:10 PM
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#10
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Full Time Camper
Join Date: Mar 2013
Location: United states of america
Posts: 1,570
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ewbldavis,
are we EVER going to see spring!..I'm up the road from you guys.
__________________
2017 Ford F350 Super Duty 6.7 King Ranch Crew
Sold the 2016 Crossroads Sunset Trail Grand Reserve 32BH
2020 Grand Design Momentum 320G
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03-19-2014, 02:54 PM
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#11
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Full Time Camper
Join Date: Apr 2011
Location: Canton, OH
Posts: 937
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Quote:
Originally Posted by OhioMark
ewbldavis,
are we EVER going to see spring!..I'm up the road from you guys.
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We had one day yesterday. Ate burgers off the grill!!!! This weekend...cold!
__________________
Eddy & Brenda
Canton, OH
2015 Silverado HD 6.0L
2014 Zinger 32QB
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03-20-2014, 07:57 AM
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#12
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Weekend Camper
Join Date: Feb 2014
Location: Texas
Posts: 10
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Quote:
Originally Posted by cw3jason
Make sure your fan is set to auto. If you have the fan on anything but auto it will blow cool air from the ceiling, while your furnace blows hot air from the floor.
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This is correct. I guess at some point we moved the fan setting off of Auto and as soon as I switched it back to Auto the AC fans stopped blowing.
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02-03-2016, 11:17 AM
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#13
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New Camper
Join Date: Feb 2016
Location: Tennessee
Posts: 1
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Quote:
Originally Posted by cw3jason
Make sure your fan is set to auto. If you have the fan on anything but auto it will blow cool air from the ceiling, while your furnace blows hot air from the floor.
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THANKS! Just had this issue and googled it and it brought me here. You answered and fixed me! Somehow my fan setting had changed to high. Love that people share their knowledge and help others. Thanks again.
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02-03-2016, 12:37 PM
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#14
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Seasonal Camper
Join Date: Feb 2013
Location: ohio
Posts: 356
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__________________
hondavalk
2008 Tundra 5.7L
2013 ST29SS
Reese DC
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