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Samsung Airconditioner AW109AB

I have a problem with this Samsung A/C unit. It builds up frost on the finns behind the air filter. It covers the finns completely and the a/c does not cool as good. What do I do?

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First is to make sure that your air filter is clean so you can move adequate air. If it is already clean, then you have a freon leak. The unit could be repaired by an a/c tech but repairs are almost always more costly than purchasing a new unit (I assume this is a window unit)

Posted on Jun 12, 2008


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Heat Pumps and Refrigerators are the same unit running backwards. To get refrigeration you create heat, to get heat, you create frost. The end blower is the thing that either gives you heat or cold air depending on what setting you are choosing.

To stop the frost building up, you just need to cover that area with insulation. The frost is caused by a cold surface that is below freezing point and water vapour in the ambient air.

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It is also a possibility the compressor is getting ready to break,bad valves.

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If you remove the entire back panel of the freezer section there is a evaporator (aluminum grill looks like a car radiator, contains r-134a, do not puncture or unit is ruined) Some frost on back freezer wall, means probably this entire grill is encased in frost, not allowing any air flow, which is how the entire refrigerator section is cooled, by air flow) The frost build up has to be removed,(got a hair dryer) you can unplug it for a couple of hours with the door open, overnight is better,this would fix the problem for a couple of weeks....Your automatic defrost is not working, there are three parts- the timer or control board, a heating element, and a bi-metal thermostat(often the problem)

You popped off the cover for the ice maker, you need to defrost the whole freezer section behind the back panel. Freezer cold means your compressor and freon are fine, you have a defrost problem with ice build up restricting air flow. A normal automatic defrost runs every 8 hours, three times a day, rule of thumb.....Sounds like you have a couple of weeks built up...........
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