User Tag List

Thanks Thanks:  0
Likes Likes:  0
Results 1 to 10 of 10
  1. #1
    Site Sponsor
    Join Date
    Mar 2017
    Location
    Minnesota
    Posts
    210
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Ac and heater working at same time

    Anyone ever turned on heat, dometric controlled , just fan, ac, and heat, and had both the ac and heater running at the same time?
    We just pulled the unit out of Storage getting it ready to head to Arizona for the winter
    Need heat not ac in Minnesota now.
    I shut down ac breaker for now
    Any ideas?
    Thanks
    Paul
    2016 Ram 3500 SWD 3:73 Turbo Diesel 6'4"" box
    OEM puck Pro 16K
    2021 Reflection 311BHS
    Previous:
    2017 Reflection 29RS
    Reese Sidewinder Hitch
    Platte Lake MN.

  2. #2
    King Pin
    Join Date
    Feb 2014
    Posts
    6,521
    Blog Entries
    10
    Mentioned
    41 Post(s)
    Tagged
    1 Thread(s)
    Hi there. This is one of the most frequently asked questions.

    Change the fan setting on your thermostat to auto. Then just the furnace fan will operate, and not the AC.

    Jim
    Last edited by TucsonJim; 11-15-2018 at 12:08 PM.

  3. #3
    Site Sponsor
    Join Date
    Mar 2017
    Location
    Minnesota
    Posts
    210
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks
    That is what’s great about this forum. Someone’s ready to answer a question.
    2016 Ram 3500 SWD 3:73 Turbo Diesel 6'4"" box
    OEM puck Pro 16K
    2021 Reflection 311BHS
    Previous:
    2017 Reflection 29RS
    Reese Sidewinder Hitch
    Platte Lake MN.

  4. #4
    King Pin
    Join Date
    Feb 2014
    Posts
    6,521
    Blog Entries
    10
    Mentioned
    41 Post(s)
    Tagged
    1 Thread(s)
    You're welcome. I find it so odd that the manufacturer still makes them this way.

    Jim

  5. #5
    Seasoned Camper
    Join Date
    Oct 2018
    Location
    La Grange, KY
    Posts
    223
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by TucsonJim View Post
    Hi there. This is one of the most frequently asked questions.

    Change the fan setting on your thermostat to auto. Then just the furnace fan will operate, and not the AC.

    Jim
    By using auto you say it will operate the furnace fan, is that just the fan or heat also? On the opposite, how would you get the a/c to run if desired?

  6. #6
    Rolling Along Houndbb's Avatar
    Join Date
    Oct 2017
    Location
    Rural Central NY
    Posts
    878
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by FR8TFLYER View Post
    By using auto you say it will operate the furnace fan, is that just the fan or heat also? On the opposite, how would you get the a/c to run if desired?
    I just remember that for heat, I want the setting on “auto”. I believe this is because once the thermostat has read the ambient temp you set, the furnace turns off, but the fan continues, to cool down the unit (avoids a potential fire). The temperature setting controls the heat.
    N
    Bruce and Nancy
    2018 Imagine 2150rb
    2011 Silverado 1500 5.3L

  7. #7
    Seasoned Camper
    Join Date
    Oct 2018
    Location
    La Grange, KY
    Posts
    223
    Mentioned
    1 Post(s)
    Tagged
    0 Thread(s)
    Thanks Hound! So for a/c what would I select?

  8. #8
    Rolling Along JColeman's Avatar
    Join Date
    Oct 2018
    Location
    Tucson, AZ
    Posts
    691
    Mentioned
    10 Post(s)
    Tagged
    0 Thread(s)
    AC / Auto or Heat / Auto. The only time you would run Fan / On is when you are just looking to circulate air.

    Fan means the fan will be on at all times. Not likely your AC compressor was on but the fan was.
    Jeff and Jen
    2016 F250 CC Lariat 4x4 6.7L, Firestone Airbags, Pullrite Superglide
    2017 Solitude 310GK, a little solar, a little lithium, disc brakes and a few suspension mods

    Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety. - Ben Franklin

  9. #9
    Setting Up Camp
    Join Date
    Mar 2019
    Location
    Florida
    Posts
    17
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My 337RLS is doing the same thing but I get a E1 flashing after Auto and the Heat and Air are running at the same time I disconnected the thermostat and got the same thing. Might be a bad controller?

    Best Regards Rusty
    337RLS

  10. #10
    New Member
    Join Date
    Aug 2020
    Posts
    2
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    2+ years later and this thread is still just as valuable! Thanks fellas, just saved me an extended headache.

    Cheers,
    Jason

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

DISCLAIMER:This website is not affiliated with or endorsed by Grand Design RV, LLC or any of its affiliates. This is an independent site.