Thread Tools Display Modes
Old 06-11-2013, 07:29 PM   #1
Mega Member
Join Date: Jan 2013
Posts: 66
AC Air Box Replacement

I just replaced the AC ceiling air box cover on my Sunseeker 3100 that provides the directional vents for the Dometic Brisk Air AC. I did not replace any controls or any part of the actual metal housing....only the plactic cover (the vents on the old one were broken and 'whistling). You'd think there would not be an issue, as I simply unscrewed one and screwed the new one in. However, now the A/C unit seems to have a significant vibration. My guess is that it is the 'squirrel cage,' as it starts as soon as the fan (without AC) comes on and is worse at low speed (it is slightly better on high). Anyone have any expereince with this type of issue or have any suggestions? Thanks!
Post Script-the A/C ran all last night and 'something' happened as the vibration is much less this morning....curious.

rgarner is offline   Reply With Quote
Old 06-11-2013, 09:15 PM   #2
Plain Old Member
Join Date: Nov 2012
Location: Full Timing in South Louisiana
Posts: 1,938
Mine has a vibration as well. Been like that since i bought it. Sometimes a dirt dobber nest on the condenser fan blade will do it, but ours never stays outside unless we're camping, then the ac is running non stop. In our case, either the motor / fan shaft is a shade off or the fan itself is out of balance. I went up there while it was running and its obvious something is out of whack.

John and Rebecca Dickson
Emma-7 / Little John-5 / Iva-1
Full Timing Again, Rev B
2013 Ford F-350 Lariat CC LB PSD
2015 SOB TT - With OC's Awning Poles (#8)
At least in Heaven, RVs will be perfect, and I won't have to keep fixing them.
BigJohnD is offline   Reply With Quote
Old 06-13-2013, 04:45 PM   #3
Mega Member
Join Date: Jan 2013
Posts: 66
Well I have not tried this yet; however an AC guy--who's been in the business for a long while---says that the squirrel cage is likely out of balance. He recommends releasing the set screw that holds the cage on the shaft, place the fan on low and let it find the sweet spot on the shaft---operating in balance----and then lock it in place there.
rgarner is offline   Reply With Quote

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


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

All times are GMT -5. The time now is 05:13 AM.