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Friedrich Model SM21N30 Coils Freezing

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Hello! I have a Friedrich Model #SM21N30 room AC unit install through the wall in my home since August 14,

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Old 06-20-2016, 11:17 AM
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Default Friedrich Model SM21N30 Coils Freezing
Model Number: SM21N30   Brand: -other-   Age: 1 - 5 years   

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Hello!

I have a Friedrich Model #SM21N30 room AC unit install through the wall in my home since August 14, 2012. Until this summer it's performed flawlessly cooling as expected. Now the interior coils have started freezing up at set temperatures as high as 68 degrees, this is where I normally set it for the past four years.

I check and clean the filter regularly it clean, the coils are also clean, spotless in fact. No outside air restrictions.

A local service person came out to check the unit and stated that it's clean, and not low on refrigerant. His test for low refrigerant was not very scientific, he basically out his hand on the coils and found uniform cooling from top to bottom. Nothing else he can do.

I called Friedrich as the sealed components are still under warrently until August of 2017 but the authorized service companies they recommended would not come to my location, they said because of distance, very strange. I don't live in a rural area, they just said its too far...

Is there anything else I can check on my own? Error codes? Thermostat?

Any help would be greatly appreciated.


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