Reply
 
Thread Tools Display Modes
Old 07-30-2019, 04:31 PM   #1
Senior Member
 
Join Date: Feb 2016
Posts: 120
Dometic A/C cycling

We have Dometic A/C unit that starts up immediately after shutting down. Cycling. If I remove our intake filter foam it seems to work fine. I have washed it out but still does same thing. Does anyone else have this problem and is there a less restrictive filter availible?
__________________

Doug Currie is offline   Reply With Quote
Old 07-31-2019, 11:58 AM   #2
Head Rambler
 
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 6,778
How old is the A/C?
Which thermostat do you have?

Could it be that it's switching fan speeds? On some units if the fan is in auto, it will stop for a few seconds when it's either nearing or drifting away from setpoint and switch speeds.

Also check the freeze coil and make sure it's against the evaporator fins.
When it shuts down pull the filter off quickly and see if there's frost on the evaporator.
__________________

__________________
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
Bama Rambler is offline   Reply With Quote
Old 07-31-2019, 12:02 PM   #3
Site Team
 
Flybob's Avatar
 
Join Date: Oct 2014
Posts: 10,166
If starting a ducted AC for the first time after arriving at the campground in a hot humid environment, it is best to open the dump valve to allow for maximum air flow to prevent freezing. Once the inside temp and humidity are decreased, you can close the dump valve and it will operate fine.
__________________

2015 Freedom Express 248RBS
TV 2015 Silverado HD2500 Duramax
TST Tire Monitors
Honda 2000I + Companion
2 100W solar panels
Flybob is offline   Reply With Quote
Old 07-31-2019, 12:06 PM   #4
Senior Member
 
Join Date: Feb 2016
Posts: 120
It is on a 2015 33RL

Has Domectic small black square digital thermostat. See photo.Click image for larger version

Name:	41sv6bPaKHL._SX425_.jpeg
Views:	50
Size:	20.3 KB
ID:	211253
Doug Currie is offline   Reply With Quote
Old 07-31-2019, 12:07 PM   #5
Senior Member
 
Join Date: Feb 2016
Posts: 120
Quote:
Originally Posted by Flybob View Post
If starting a ducted AC for the first time after arriving at the campground in a hot humid environment, it is best to open the dump valve to allow for maximum air flow to prevent freezing. Once the inside temp and humidity are decreased, you can close the dump valve and it will operate fine.
Does it with dump valve open as well
Doug Currie is offline   Reply With Quote
Old 07-31-2019, 12:47 PM   #6
Head Rambler
 
Join Date: Mar 2008
Location: Southwest Alabama
Posts: 6,778
You can try initializing that thermostat and see if that helps. I doubt it will since you say that removing the filter stops it from happening.
__________________
Salem 29RKSS Pushing a GMC Sierra 2500HD!
Gotta go campin!
Bama Rambler is offline   Reply With Quote
Old 09-02-2019, 12:59 PM   #7
Senior Member
 
Join Date: Apr 2017
Location: Seminole, FL
Posts: 223
I have the dual zone t-stat in our CC 34IK which was short cycling. Dometic said that's how they're supposed to work. After digging around on the Dometic site I found the installation manual for our 15k btu unit which along includes the user manual for the t-stats. After being told there was no offset adjustment I found, in the manual of all places, the instructions for adjusting the setback or dead band.
See if you can find your unit manual online and follow the instructions to set your offset to 2F instead of 1F and I bet it will quit cycling. Mine did.
__________________

__________________
TCrossan
2020 CC Hathaway 34IK, 2012 F350
tcrossan is offline   Reply With Quote
Reply

Tags
dometic

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Featured Campgrounds

Reviews provided by

Disclaimer:

This website is not affiliated with or endorsed by Forest River, Inc. or any of its affiliates. This is an independent, unofficial site.



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 03:39 AM.


×