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Old 09-15-2021, 11:02 PM   #1
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Powell Butte , Oregon
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Dometic Air-conditioner Motor Mount Screw

My 2021 Caravel 20FB Dometic AC unit was making a loud racket. Repair guy found a motor mount screw had fallen out causing the fan to be out of balance. The screw doesnít have a regular nut fastener. Itís held in place by a rubber bushing/nut. See attached photo. Anyone encounter a similar issue? Iím concerned the screw will come loose and fall out again. Click image for larger version

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Old 09-16-2021, 04:38 AM   #2
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I ran into that same problem during our summer trip. I have not decided if that's something I should check periodically like I do with other screws in the trailer, or just wait to see if the problem happens again. It didn't seem like the out of balance condition was likely to damage anything. But the noise was really annoying.
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Old 09-16-2021, 05:56 AM   #3
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Probably done that way to reduce mechanical noise intrusion and vibration transfer.....common technique to isolate a vibrating mechanism. Most likely the rubber receiver was not installed correctly, it was defective/malformed, or has tolerance issues for the screw being used.

Maybe call Dometic and ask them what their diagnostic would be and if they could send you a replacement rubber receiver and mating screw? The dealer or JC will just say replace the whole thing....which doesn't jive for something that you can clearly replace as you're already at the repair point location.
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Old 09-16-2021, 11:32 PM   #4
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Powell Butte , Oregon
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Quote:
Originally Posted by teagues View Post
I ran into that same problem during our summer trip. I have not decided if that's something I should check periodically like I do with other screws in the trailer, or just wait to see if the problem happens again. It didn't seem like the out of balance condition was likely to damage anything. But the noise was really annoying.


Thank you for your response.
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Old 09-16-2021, 11:33 PM   #5
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Powell Butte , Oregon
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Quote:
Originally Posted by kittmaster View Post
Probably done that way to reduce mechanical noise intrusion and vibration transfer.....common technique to isolate a vibrating mechanism. Most likely the rubber receiver was not installed correctly, it was defective/malformed, or has tolerance issues for the screw being used.



Maybe call Dometic and ask them what their diagnostic would be and if they could send you a replacement rubber receiver and mating screw? The dealer or JC will just say replace the whole thing....which doesn't jive for something that you can clearly replace as you're already at the repair point location.


Thank you for your response.
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