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Old 05-09-2018, 04:42 PM   #1
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Air Conditioner Fan runs continuously.

I have a three way Thermostat.

[Fan] [Cool] [Furnace]
No matter what I set it on the Air Conditioner Fan runs continuously.
When on COOL the fan runs continuous even when the Compressor cycles off.
When on FURNACE the Air Conditioner Fan runs Continuously even though the Furnace has its own Fan and Ducts. The Furnace works the way it should, just the Air Conditioner Fan runs with it.


What am I looking at to fix?


Dometic Thermostat 3313192.xxx Single Zone LCD
Dometic Air Con 13500BTU 57915.xx1c0
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Old 05-09-2018, 04:48 PM   #2
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Quote:
Originally Posted by e.irl View Post
I have a three way Thermostat.

[Fan] [Cool] [Furnace]
No matter what I set it on the Air Conditioner Fan runs continuously.
When on COOL the fan runs continuous even when the Compressor cycles off.
When on FURNACE the Air Conditioner Fan runs Continuously even though the Furnace has its own Fan and Ducts. The Furnace works the way it should, just the Air Conditioner Fan runs with it.


What am I looking at to fix?


Dometic Thermostat 3313192.xxx Single Zone LCD
Dometic Air Con 13500BTU 57915.xx1c0
your fan is set to ON. reset it to Auto
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Old 05-09-2018, 04:50 PM   #3
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There are two controls
Operation: Heat /Cool /Off
Fan: Hi LOW AUTO

Go to the Fan setting and select AUTO. It will cycle with the compressor and stay off when the furnace is on.. Hi and Low are designed to circulate air even when AC is off and when furnace runs.
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Old 05-09-2018, 04:59 PM   #4
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Quote:
Originally Posted by Flybob View Post
There are two controls
Operation: Heat /Cool /Off
Fan: Hi LOW AUTO

Go to the Fan setting and select AUTO. It will cycle with the compressor and stay off when the furnace is on.. Hi and Low are designed to circulate air even when AC is off and when furnace runs.
The owners manual should tell you how to do this.
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Old 05-09-2018, 05:31 PM   #5
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Ditto for cavie
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Old 05-10-2018, 09:44 AM   #6
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Thank You
That worked

In all the time I messed with the Thermostat I never noticed the AU setting.
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Old 05-10-2018, 02:53 PM   #7
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I'm not sure where you'll be camping, but as a suggestion, if you are camping in the hot summertime, 85+, keep your fan on during the day, switch it to Auto in the evening. Your A/C will be more efficient and your RV will be cooler.
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Old 05-11-2018, 08:25 AM   #8
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Reply to Fan Running All The Time

Reply to e.irl
We purchased a 2018 3011 DS in October. Right off the bat the issue of the fan running all the time. Went back to dealer....no help. Read the "forum" set fan to "auto"....did that.....no help. The unit was an Atwood.
Read the manual, etc.
Finally....went to the extreme! We bought and paid for a Dometic A/C to replay the Atwood....so far everything is working fine.
Hoping you don't have to go this route?
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Old 05-11-2018, 08:48 AM   #9
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Seams like we talk about this every week !!!
No one is using SEARCH anymore !!!

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Old 05-11-2018, 08:58 AM   #10
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Originally Posted by Wolverine 1945 View Post
Seams like we talk about this every week !!!
No one is using SEARCH anymore !!!

I agree, but the search is kind of hit or miss. I searched 'fan running', and ignoring this string which was first; I can see one string that might actually apply.

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