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07-25-2018, 03:11 PM
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#21
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New Member
Join Date: May 2017
Location: Cartersville
Posts: 2
M.O.C. #19908
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Quote:
Originally Posted by Kent Carter
Count me in! Mine does the same thing and the bedroom ac does it more often. Keystone c/s said it was normal.
This past weekend at about 2 in the am, the one in the bedroom came on for a few seconds and went off. It did this about four times before I had enough and shut it off.
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That is exactly what I did!!!! It is very annoying, specially in the bedroom.
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07-25-2018, 03:18 PM
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#22
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Seasoned Camper
Join Date: Apr 2018
Location: St Augustine
Posts: 53
M.O.C. #21665
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That’s why I switch to low fan at night. It doesn’t cycle on and off other than the compressor coming on when the thermostat requires it. The fan running all the time just becomes “white” noise.
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07-25-2018, 04:16 PM
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#23
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Montana Fan
Join Date: Dec 2017
Location: Holts Summit
Posts: 126
M.O.C. #20913
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I think this is normal behavior. You might want to read the user's guide for your thermostat. It may be just shifting to low fan when it's getting close to the desired temperature.
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07-25-2018, 05:45 PM
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#24
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Established Member
Join Date: Mar 2018
Location: Crestview
Posts: 13
M.O.C. #21308
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Same here
New 3731FL both the front and the bedroom cycle the fan in the same way as described. I'm in the no idea why Club
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07-25-2018, 06:00 PM
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#25
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Established Member
Join Date: Oct 2017
Location: Orlando
Posts: 19
M.O.C. #20752
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We had this trouble too. After switching the bedroom AC to high at night, rather than auto, we haven't had any problems.
__________________
SA Smith
Author & Full Time RVer
2018 Montana 3721rl
2017 Ram 3500 dually
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07-25-2018, 06:02 PM
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#26
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Established Member
Join Date: Oct 2017
Location: Orlando
Posts: 19
M.O.C. #20752
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Quote:
Originally Posted by ingalmi
That’s why I switch to low fan at night. It doesn’t cycle on and off other than the compressor coming on when the thermostat requires it. The fan running all the time just becomes “white” noise.
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We were told by a tech that in warm weather not to use the low cycle. Supposedly it doesn't use enough air to circulate and can freeze the AC. They recommended only using it on High or auto.
__________________
SA Smith
Author & Full Time RVer
2018 Montana 3721rl
2017 Ram 3500 dually
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07-26-2018, 10:52 AM
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#27
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Established Member
Join Date: Mar 2018
Location: Watkinsville
Posts: 12
M.O.C. #21401
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We also have a 2018 3731FL that does the same thing when in Auto mode. We were advised to turn the fan to High and haven't had the problem again. It actually works out well to have the fan on consistently- especially while we sleep- because it drowns out any outside noise.
__________________
Tracy & Tammy- Watkinsville, GA
2018 3731 FL
2017 Ford F-350 Turbo Diesel SRW
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07-26-2018, 11:56 AM
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#28
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Montana Master
Join Date: May 2011
Location: Hixson
Posts: 3,436
M.O.C. #11397
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Have you done the mod to your return air ducts yet? Are you in CFP? We are on #80.
__________________
2018.5 Montana 3791RD
Full Timers 9/1/2010 through 1/16/2020.
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07-26-2018, 12:33 PM
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#29
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Established Member
Join Date: Jun 2018
Location: Spring Hill
Posts: 12
M.O.C. #21897
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Same Issue
We have a 2017 3820fk and we have the same issue. I mounted a small thermometer next to the thermostat and it sometimes drives the temp down to 5 or 6 degrees below the setting before shutting down. But the cycling on off is annoying. I have taken back three times complaining and they tell me there is nothing wrong with the unit. I thought the thermostat was too sensitive but they checked it as well and blessed it as good. Hopefully, I have it on record under warranty if it ever quits.
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07-26-2018, 01:35 PM
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#30
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Montana Master
Join Date: Dec 2017
Location: Chattanooga
Posts: 681
M.O.C. #20906
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Quote:
Originally Posted by TDury
We have a 2017 3820fk and we have the same issue. I mounted a small thermometer next to the thermostat and it sometimes drives the temp down to 5 or 6 degrees below the setting before shutting down. But the cycling on off is annoying. I have taken back three times complaining and they tell me there is nothing wrong with the unit. I thought the thermostat was too sensitive but they checked it as well and blessed it as good. Hopefully, I have it on record under warranty if it ever quits.
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Can't be good on the fan motor, starting up so much.
__________________
2019 Montana 3121RL
2017 XLT 350 SCLB DRW 4X4
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07-26-2018, 01:38 PM
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#31
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Montana Master
Join Date: Dec 2017
Location: Chattanooga
Posts: 681
M.O.C. #20906
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Quote:
Originally Posted by WeBeFulltime
Have you done the mod to your return air ducts yet? Are you in CFP? We are on #80.
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Yes we are on #159, glad you made it back, will swing by one afternoon and see you guys. My ductwork is not collapsed. Cooling seems to be good and you can feel the air flow. It pretty much has to be something in the thermostat cutting the fan motor off/on. The compressor continues to run until the thermostat is satisfied.
__________________
2019 Montana 3121RL
2017 XLT 350 SCLB DRW 4X4
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07-26-2018, 01:44 PM
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#32
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Established Member
Join Date: May 2018
Location: Newport
Posts: 45
M.O.C. #21746
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I have a 2018 3121RL and experience the same problems. I took it to CW and they kept it for 10 days and told me they couldn't find any problem. Now my rear A/C thermostat is on Celsius and I can't find any info on how to switch it back. The user guide doesn't mention it and Dominic website is a joke, unless you are willing to pay to chat with a tech. Help!
One note on Roanoke CW. The folks there are very nice and friendly and seem to be interested in helping but I don't think they have qualified service technicians. From previous posts I think this is a problem industry wide.
__________________
2018 Montana 3121RL, 35 feet of home away from home.
2018 Chevy 3500HD, 4WD, Double Cab, SRW, 8' bed, Summit White with stump pulling diesel.
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07-26-2018, 01:59 PM
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#33
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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[QUOTE=Wyatt Earp;1108007]I have a 2018 3121RL and experience the same problems. I took it to CW and they kept it for 10 days and told me they couldn't find any problem. Now my rear A/C thermostat is on Celsius and I can't find any info on how to switch it back. The user guide doesn't mention it and Dominic website is a joke, unless you are willing to pay to chat with a tech. Help!
Touch the up and down arrows at exactly the same time and it will change back to F. The problem is you can switch it back simply by brushing your shoulder against it. You know how I know.
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07-26-2018, 02:23 PM
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#34
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Established Member
Join Date: May 2018
Location: Newport
Posts: 45
M.O.C. #21746
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DQDick, thanks for the information! It's folks like you that make MOC worth being a member.
__________________
2018 Montana 3121RL, 35 feet of home away from home.
2018 Chevy 3500HD, 4WD, Double Cab, SRW, 8' bed, Summit White with stump pulling diesel.
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07-30-2018, 09:30 AM
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#35
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Montana Master
Join Date: Sep 2017
Location: Willis
Posts: 896
M.O.C. #20587
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[QUOTE=DQDick;1108010]
Quote:
Originally Posted by Wyatt Earp
I have a 2018 3121RL and experience the same problems. I took it to CW and they kept it for 10 days and told me they couldn't find any problem. Now my rear A/C thermostat is on Celsius and I can't find any info on how to switch it back. The user guide doesn't mention it and Dominic website is a joke, unless you are willing to pay to chat with a tech. Help!
Touch the up and down arrows at exactly the same time and it will change back to F. The problem is you can switch it back simply by brushing your shoulder against it. You know how I know.
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Thanks for the info. Our user's guide and their web pages seem pretty lame. I got ours on C* while trying to figure out why the temp display was rolling all over the place and changing by magic to heat, cool, etc. Not sure what all that was about.??? But to the OP, setting on high fan solved the fan on/off cycles.
__________________
2018 Montana 3791RD (SOLD)
2017 Ram 3500 DRW 6.7 Cummins Aisin, B&W RVK3600 (SOLD)
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07-30-2018, 09:35 AM
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#36
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Montana Master
Join Date: Sep 2017
Location: Willis
Posts: 896
M.O.C. #20587
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Lame user guide says "in the unlikely event you experience a system failure, refer to the "SERVICE" section of the operating instructions furnished with your unit" All I got was a warranty page and user guide. The user guide on their web page is for a different stat.
__________________
2018 Montana 3791RD (SOLD)
2017 Ram 3500 DRW 6.7 Cummins Aisin, B&W RVK3600 (SOLD)
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07-30-2018, 09:36 AM
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#37
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Seasoned Camper
Join Date: Apr 2018
Location: St Augustine
Posts: 53
M.O.C. #21665
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So here’s some info for you, Dometic has recognized the problem and made a change to the faceplate. Has to do with the touch zones and how it makes contact. Word is they will send replacement faceplates.
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07-30-2018, 09:39 AM
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#38
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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[QUOTE=masterdrago;1108591]
Quote:
Originally Posted by DQDick
Thanks for the info. Our user's guide and their web pages seem pretty lame. I got ours on C* while trying to figure out why the temp display was rolling all over the place and changing by magic to heat, cool, etc. Not sure what all that was about.??? But to the OP, setting on high fan solved the fan on/off cycles.
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I've also found that if you take the cover off the thermostat and don't snap it back on perfectly straight something on the little touch pads gets caught (or something) and the rolling starts. Take the cover back off and try and push it on exactly straight. Anyway it has worked for me.
__________________
Dick, Joyce, Diego, Picatso and Gustav
2017 3720 RL, and 2013 HC 343RL
Pullrite Hitch, IS, Disk Brakes, 3rd AC, Winegard Traveler, Bathroom door mod, Dometic 320, couch for desk swap, replaced chairs, sun screens, added awnings, etc.
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07-30-2018, 09:41 AM
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#39
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Site Team
Join Date: Sep 2017
Location: Oro Valley
Posts: 4,081
M.O.C. #20477
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[QUOTE=masterdrago;1108591]
Quote:
Originally Posted by DQDick
Thanks for the info. Our user's guide and their web pages seem pretty lame. I got ours on C* while trying to figure out why the temp display was rolling all over the place and changing by magic to heat, cool, etc. Not sure what all that was about.??? But to the OP, setting on high fan solved the fan on/off cycles.
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If the user guide doesn't work and you can't find your answer here, I recommend YouTube. I think you can find the right YouTube video for almost anything these days.
__________________
Zack and Donna plus Millie and Ranger
2018 3160RL
"Life is too short to stay indoors, enjoy the ride!"
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07-30-2018, 09:48 AM
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#40
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Established Member
Join Date: Nov 2017
Location: St. louis
Posts: 27
M.O.C. #20874
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Quote:
Originally Posted by ingalmi
So here’s some info for you, Dometic has recognized the problem and made a change to the faceplate. Has to do with the touch zones and how it makes contact. Word is they will send replacement faceplates.
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Can you elaborate on that info? What change have they made, and how can we get the "new and improved" faceplates???
__________________
Walter & Garland
GSD Inga
2018 High Country 305RL
2018 Silverado 3500HD
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