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Thread: Rear A/C Constantly Freezing
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07-05-2021, 06:07 PM #1
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Rear A/C Constantly Freezing
We just purchased a 378MBS and the rear A/C unit freezes up just about every time we use it. We’re in southern Pa and the outside temp has been about 80’s and 90’s. Is there something I am missing? It seems to be struggling to keep the temp at 80 something.
Thanks!!
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07-05-2021, 06:12 PM #2
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07-05-2021, 08:03 PM #3
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Flow out the vents seems to be adequate. It does slow down once it is frozen. Every so often it sounds like there is an ice maker up in the ducts.
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07-05-2021, 09:25 PM #4
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Pull the cover off inside and take a look - there should be a wire with a sensor on the end stuck in the fins, which monitors the temp to make sure it doesn't freeze up and defrosts. They fall out sometimes.
Jake and Leah, our two boys, and our Lab
Based out of North Carolina, currently in Henderson, TX
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07-05-2021, 09:34 PM #5
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Regards, Bruce, Lin An, Kenji & Suki (Our two Akitas)
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07-06-2021, 02:01 PM #6
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It was in the fins, bottom right hand corner. I moved it to center up 2”. Hopefully that works!! Thanks, I’ll give an update after running it for the rest of the day.
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07-06-2021, 02:59 PM #7
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The freeze sensor will shut the AC down if it senses a freeze. It is not a fix for a unit that freezes up. That needs to be addressed.
You have a low charge, collapsed or blocked duct or the divider baffle in the unit that seperates the supply air from the return is allowing cold air to leak back to the return side and causing the coil to freeze.2010 Jayco 26(SOLD)
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07-06-2021, 03:07 PM #8
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Regards, Bruce, Lin An, Kenji & Suki (Our two Akitas)
2019 Solitude 310GK-R
2015 Ram 3500 Big Horn CC, TD, Aisin Tranny, DRW
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07-25-2021, 06:54 PM #9
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Bruce-
I have had some issues with forced rests and moving the sensor did help for awhile- now I am getting frozen coils.
Question for you just for clarification was your sensor shutting the unit down forcing you to do a resart or where your coils freezing up causing you to need to defrost it?
Thanks for entertaining my question as I troubleshoot as per the prior post.Ex-Nihilo
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07-25-2021, 08:56 PM #10
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DECelt
2021 Solitude 310-GK
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Re-pack bearings necessary?
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