Question about Carrier 52PQ307 Wall/Window Air Conditioner

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Ice on the coil fins of my Window AC unit......



I noticed that there is a think blanket of ice forming in the coil fins of my Window airconditioning unit. It seems the ice is "blocking" the air coming from the fans of the AC unit so, there is less cold air coming from the unit because of the ice. What seems to be the problem??

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  • 5spit Jul 24, 2008

    My R.V.unite is ducted in ceiling.If the unite run for 3 or 4 hours even on auto the evap. will freeze up.

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Set your unit to fan mode only, to thaw the ice, after the ice melts, look at your evaporator coil, see if its dirty, if its dirty, then you might just need a good cleaning. if the coil is clean, look at your thermostat setting. it should not be all the way cold. the compressor would run continously and it would freeze the coil. third, the refrigerant system could be partially clogged up or it lacks refrigerant. these problems initiate freezing of the coil.

Posted on Feb 19, 2008

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You will find that the fins of the evaporator ( ac unit in car) are blocked up from gunk the floats around inside the cabin.. You may be able to clean it with an ac cleaner or compressed air. What is happening is that the gunk is forming ice which tells the TX valve that the temperature has been reached and so the ac compressor shuts off . The ice melts and the circle is repeated.. You may be tinkling as the ice breaks free of the fins and falls inside the ac box.

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I do not think it's likely that 'low refrigerant' is your problem because generally speaking - you won't lose the refrigerant out of a window unit barring an accidental puncture, or maybe from dropping the unit or something like that.
Therefore I would suspect that you have - reduced air flow over the coil - and the most likely reason is the coil being dirty/clogged.
I would take the unit out of the window and wash it real good ( a water hose with a pressure nozzle works really good).
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Your in the wrong form group!
"Problem with Microsoft Windows XP Home Edition"

Seems you need to in form group "window a./c evaperator coil ice build up" Not windows computer XP issue! Check it out.

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mcdevito75 here, Possibly, the filter needs cleaning / replacement, unit set to too cold. Shut A/C off, let the ice melt on it"s own DO NOT REMOVE ICE YOURSELF, those coils have the fren gas in them, when the ice is all melted restart unit, set temp. not so cold, around 60--65 degrees, and have exhaust to out. This shpoul;d help, you can always check with your local A/C repair shop, they come to the house.

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three possible prolems here 1 check the evaporator coil and filter to see if they are dirty and need to be cleaned dirt gets into the coil by by-passing the filter or the filter is no longer able to contain the dirt. 2 if there is a opening in your furnace that allows air to the furnance without going through the return air vent this could be a cause 3 low on freon in which a tech will be needed to check. Also check the outside unit and see if the coils have a lot of debris on them if so you can use a garden hose to clean them but make sure to have the power off and just spray the coils nothing else. Good luck

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