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Old 07-25-2018, 04:11 PM   #21
Dorrie
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Originally Posted by Kent Carter View Post
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.
That is exactly what I did!!!! It is very annoying, specially in the bedroom.
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Old 07-25-2018, 04:18 PM   #22
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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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Old 07-25-2018, 05:16 PM   #23
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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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Old 07-25-2018, 06:45 PM   #24
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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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Old 07-25-2018, 07:00 PM   #25
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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.
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Old 07-25-2018, 07:02 PM   #26
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Originally Posted by ingalmi View Post
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.
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.
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Old 07-26-2018, 11:52 AM   #27
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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.
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Old 07-26-2018, 12:56 PM   #28
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Have you done the mod to your return air ducts yet? Are you in CFP? We are on #80.
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Old 07-26-2018, 01:33 PM   #29
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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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Old 07-26-2018, 02:35 PM   #30
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Originally Posted by TDury View Post
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.
Can't be good on the fan motor, starting up so much.
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Old 07-26-2018, 02:38 PM   #31
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Have you done the mod to your return air ducts yet? Are you in CFP? We are on #80.
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.
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Old 07-26-2018, 02:44 PM   #32
Wyatt Earp
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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.
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Old 07-26-2018, 02:59 PM   #33
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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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Old 07-26-2018, 03:23 PM   #34
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DQDick, thanks for the information! It's folks like you that make MOC worth being a member.
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Old 07-30-2018, 10:30 AM   #35
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[QUOTE=DQDick;1108010]
Quote:
Originally Posted by Wyatt Earp View Post
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.
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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Old 07-30-2018, 10:35 AM   #36
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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.
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Old 07-30-2018, 10:36 AM   #37
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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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Old 07-30-2018, 10:39 AM   #38
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[QUOTE=masterdrago;1108591]
Quote:
Originally Posted by DQDick View Post
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.
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.
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Old 07-30-2018, 10:41 AM   #39
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[QUOTE=masterdrago;1108591]
Quote:
Originally Posted by DQDick View Post
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.
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.
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Old 07-30-2018, 10:48 AM   #40
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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.

Can you elaborate on that info? What change have they made, and how can we get the "new and improved" faceplates???
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