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02-25-2019, 10:47 AM
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#1
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Junior Member
Join Date: Nov 2018
Location: Bradenton, Fl.
Posts: 15
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AC fan never shuts off
2014 Thor Palazzo 35.1. Dual Dometic AC units with ducted delivery.
Running both AC units at same temperature. Rear shuts off completely when temperature reached, but other unit shuts down compressor, but fan never stops? Is this "normal"? Does anyone have any suggestions/comments on this?
Also, running both on generator yesterday while traveling, both units turned off completely. When later connected to shore power, they ran just fine. What's with that?
Thanks for any help.
Rich
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02-25-2019, 10:54 AM
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#2
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Senior Member
Join Date: Nov 2011
Location: Full time RV'er
Posts: 5,499
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It's traditional to put your RVs Brand, Model, and year in your signature or at least mention it in your posting. Helps get better answers. And if you know the model of the component you're asking about, the ACs for instance, it helps to name those too.
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02-25-2019, 11:16 AM
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#3
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Community Administrator
Tiffin Owners Club
Join Date: Sep 2013
Location: DFW, Texas
Posts: 23,920
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Quote:
Originally Posted by Termigator
2014 Thor Palazzo 35.1. Dual Dometic AC units with ducted delivery.
Running both AC units at same temperature. Rear shuts off completely when temperature reached, but other unit shuts down compressor, but fan never stops? Is this "normal"? Does anyone have any suggestions/comments on this?
Also, running both on generator yesterday while traveling, both units turned off completely. When later connected to shore power, they ran just fine. What's with that?
Thanks for any help.
Rich
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Maybe a dumb question, but did you happen to have the fan turned to ON instead of AUTO? With the fan set to ON, it will run constantly regardless of the thermostat setting.
__________________
 2017 Phaeton 40IH XSH Maroon Coral - Power Glide Chassis with IFS
Previous '15 Tiffin Allegro RED 38QRA and '06 Itasca Sunrise 35A
White '24 Jeep JLU Wrangler Willys
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02-25-2019, 11:32 AM
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#4
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Junior Member
Join Date: Nov 2018
Location: Bradenton, Fl.
Posts: 15
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Not dumb at all
Thanks for the reply, and not a dumb one at all. I have done that before (on a different thermostat), but this thermostat only has 4 settings: fan, a/c, heat, and off. On a/c, cools just fine, but fan never stops. Shorting somewhere perhaps?
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02-25-2019, 11:35 AM
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#5
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Senior Member
Join Date: Jun 2015
Posts: 323
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It happens sometimes, with my Dometics........they get confused !
Usually a thermostat reset, or pulling the DC fuse fixes it.
__________________
2015 Dutch Star 4381
Workin on the road
Currently Houston Tx
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02-25-2019, 12:01 PM
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#6
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Senior Member
Join Date: Feb 2017
Posts: 1,037
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Quote:
Originally Posted by Termigator
Thanks for the reply, and not a dumb one at all. I have done that before (on a different thermostat), but this thermostat only has 4 settings: fan, a/c, heat, and off. On a/c, cools just fine, but fan never stops. Shorting somewhere perhaps?
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Yes... and IIRC in FAN you should have the choice of "auto" or "low/high"...... There is no separate fan setting in the heating or cooling mode.
__________________
'20 RAM 3500, '20 Heartland Road Warrior 430 https://thecastle.blog/ Also: Eagle Cap 950 Before:'17 Berkshire 38A class A https://dragonship.blog/ '11 Heartland Cyclone TH, '11 Lance TC, '05 Keystone TT, '76 Coachmen class A and a '16 DIY Transit conversion........
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02-25-2019, 12:08 PM
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#7
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,845
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Most have the option of fan 'low','high', or 'Auto'.
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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02-25-2019, 12:13 PM
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#8
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Senior Member
Join Date: Feb 2017
Posts: 1,037
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Quote:
Originally Posted by 96 Wideglide
Most have the option of fan 'low','high', or 'Auto'.
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You are correct. Fixed my post.
__________________
'20 RAM 3500, '20 Heartland Road Warrior 430 https://thecastle.blog/ Also: Eagle Cap 950 Before:'17 Berkshire 38A class A https://dragonship.blog/ '11 Heartland Cyclone TH, '11 Lance TC, '05 Keystone TT, '76 Coachmen class A and a '16 DIY Transit conversion........
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02-25-2019, 02:27 PM
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#9
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Registered User
Join Date: Oct 2016
Posts: 2,078
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Quote:
Originally Posted by 96 Wideglide
Most have the option of fan 'low','high', or 'Auto'.
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On mine if you set it to high, the fan will run continuously on which ever unit you made that selection and not shut off, compressor just cycles to control temp
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02-25-2019, 02:32 PM
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#10
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Senior Member
Holiday Rambler Owners Club
Join Date: Aug 2010
Posts: 9,845
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Yeah, thats generally what they do when the fan is set to high, or low.
Only on Auto will the fan shut down with the compressor.
__________________
Ben & Sharon
2008 43' Holiday Rambler Scepter PDQ
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