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Old 06-11-2013, 03:00 PM   #1
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A/C 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.

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Old 06-11-2013, 10:25 PM   #2
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Perhaps a piece of plastic from the old grill is lodged in the fan?

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Old 06-11-2013, 10:55 PM   #3
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You might want to pull the cover and check the fan and housing...they're a great spot for a wasp nest or mud dauber.


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