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Old 03-17-2016, 11:34 AM   #1
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A/C

In my 2016 24R we used the roof air for the first time. It drove us crazy cycling through and set at 73. Has anyone had this issue?

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Old 03-17-2016, 11:45 AM   #2
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I don't have an RV like yours, but we have experienced something similar. If we set our thermostat to 72 or 73, the unit cycles quite often. If we bump it up to 74 or down to 71 the cycles are greatly reduced without any ill effects to the ability to keep the TT cool. I think these thermostats have some quirks.
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Old 03-17-2016, 01:03 PM   #3
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In my 2016 24R we used the roof air for the first time. It drove us crazy cycling through and set at 73. Has anyone had this issue?

Dogpa
Similar issue on my 2014 24R. Like others mentioned, bump it up or down a degree or two usually solves the problem.
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Old 03-17-2016, 02:03 PM   #4
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Thanks for tips. Phew no dealer involved.
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Old 03-18-2016, 09:24 AM   #5
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After another sleepless noisy night I have attempted to contact FR. I tried all settings to no avail blues it would be nice to have the owners manual.

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Old 03-18-2016, 10:08 AM   #6
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Is the AC fan cycling on and off what is the problem? If so, try setting the fan at the thermostat to "Hi" or "Lo" instead of "Au" (auto). Select fan then use "+" or "-" to choose hi or Lo, then select AC. On hi or Lo the fan runs continuously and just the compressor switches on and off with temperature.
There is also a way (with our Dometic 13.5K AC) to change the temp swing allowed between cycles, but I don't remember the details. In the manual somewhere.
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Old 03-18-2016, 10:16 AM   #7
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Is the AC fan cycling on and off what is the problem? If so, try setting the fan at the thermostat to "Hi" or "Lo" instead of "Au" (auto). Select fan then use "+" or "-" to choose hi or Lo, then select AC. On hi or Lo the fan runs continuously and just the compressor switches on and off with temperature.
There is also a way (with our Dometic 13.5K AC) to change the temp swing allowed between cycles, but I don't remember the details. In the manual somewhere.
Jim
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Old 03-18-2016, 10:34 AM   #8
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I don't know what thermostat you have but if it is an inexpensive analog stat, swapping it for a digital will help. Many analog stats cycle both the A/C and the furnace way more than necessary because of their swing.

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Old 03-18-2016, 02:40 PM   #9
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There is also a way (with our Dometic 13.5K AC) to change the temp swing allowed between cycles, but I don't remember the details. In the manual somewhere.
Jim

"To set the temperature differential the system must be Off. Press the “―” button and, while holding it, also press and hold the On/Off Mode button for three seconds. Release the On/Off Mode button. Then release the “―” button. Press the “+” button to toggle between “d1” and “d2”, “d1” for 1 degree F differential and “d2” for 2 de- grees F differential."


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Old 03-18-2016, 04:02 PM   #10
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Also....be sure a supply register is not blowing towards the thermostat.The cool air will cycle the stat too fast.
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Old 03-18-2016, 04:22 PM   #11
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After another sleepless noisy night I have attempted to contact FR. I tried all settings to no avail blues it would be nice to have the owners manual.

Dogpa
This is a thermostat problem. Here is the one I believe you have.
Attached Files
File Type: pdf Dometic Thermosat.pdf (1.40 MB, 65 views)
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Old 03-18-2016, 05:24 PM   #12
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After another sleepless noisy night I have attempted to contact FR. I tried all settings to no avail blues it would be nice to have the owners manual.

Dogpa
Try opening the overhead grate in the dining area when you go to bed and close the sliding door. Make sure the bedroom overhead register is not pointing at the thermostat.
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Old 03-19-2016, 06:59 PM   #13
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Have been in the Rio Grande Valley of Texas the past month with our MBS and have used my 13.5 AC extensively. Set the fan on lo and temp at 74 or 75. Can hardly hear the compressor kicking in and out but the fan is quite noisy.
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