Question about Kenmore 75085 Air Conditioner

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Freezing up my a/c unit keeps freezing up.....get ice on front of cooling "fins"...what can i check, or what can i try?

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The number 1 reason for freezing is not enough air flow across the evaporator (inside) coil. Check filter, and try vacuuming the coils. Use care to not mash or bend the fins. If this does not work, then perhaps a wash with a soap solution and water hose will do the trick for you.

Posted on Jun 29, 2009

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Front grill


Check the air filter and if it is dirty, replace..
Turn equipment off and let the ice melt.
After ice melts, place a/c in cooling mode and set the thermostat to 3 degrees below room temp display.

The indoor unit fan should start blowing cold air immediately and then turn off once the room temp drops one degree below the cooling temp setting.
If the indoor unit does cycle off, check the outdoor unit and make sure it turns off at the same time.
If the outdoor unit continues to run and the indoor fan is not running, the indoor unit will ice up.
A defective compressor relay that is stuck in a closed position will cause icing of the indoor unit because it keeps the compressor running when it should turn off with the indoor fan.

Do you have an error code being displayed on the controller?
Is there an led light that is flashing on the indoor unit?

Another possibility causing the indoor unit to ice up is if the freon in the system starts to get low.
Make sure the ice has all melted for this next check.
Pretty easy to check without special tools.
If the air filter is clean and there is no dust/ dirt blocking the fins on the indoor unit, turn a/c back on to cool and check that the indoor unit fan comes on and is blowing air good.
Once everything seems to running good go to the outdoor unit.
There will be two lines with black rubber insulation covering them.
Peel back the insulation three inches on each line and observe the copper lines.
If either line starts to frost up the a/c system is most likely low on refrigerant.


Another cause of indoor unit icing could be that the aluminum fins behind the air filter are clogged with dust or other foreign material.
This would block the air that must be pulled in causing the indoor unit coil to become too cold due to lack of air flow and it will ice up.

Operating the cooling system when the outdoor temperature is below 60 degrees can cause the indoor unit to ice up also.

I'm Robert.
Florida certified a/c contractor. 30 years experience.
Hope this helps.


Mar 18, 2014 | Fujitsu Heating & Cooling

1 Answer

It cools great when first turned on. After so many hours of cooling it stops cooling


Have you checked up in filter area at ceiling to see if fins are frozen or frosted bad? If they are dirty, they can cause frost/ice and AC goes in to fan only until frost/ice is gone. When did unit actually get a good cleaning last? Too many registers closed or blocked can cause freeze up as well. Does this unit have ducted or non-ducted system?

Aug 18, 2013 | Dometic Rooftop RV Air Conditioner

1 Answer

I have cleaned out the refrigerator and it still doesn't cool enough to freeze the ice and the bottom isn't cooling enough either even after putting the temperature up.What can I do next?


Have you cleaned off the fins at the bottom of fridg? look on back at bottom and bottom front. Take off covers and see if fins are dusty if so vacume off be careful not to damage fins.

Jul 07, 2012 | Refrigerators

1 Answer

Drain freezes and bottom ices up ii have thawed it cleaned the hose and it does the same thing each time


My be that the unit is not defrosting. There is a timer that turns off the freezer and turns on a heating element to melt the ice in the cooling fins. If this does not happen the fins fill with ice and ice begins to form as the water drips down under the ice. the bottom will freeze and the top will begin to warm.

Sep 19, 2010 | Maytag Freezer MQU2057

1 Answer

Cooling fins surrounding coils are freezing and


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.

Jun 25, 2010 | LG Electronic Window Air Conditioner

1 Answer

LG Bottom Freezer Frost Issue


It sounds like your defrost controller has gone bad. I have an LFC25760 and had ice build up in the bottom of the freezer such that water would start leaking onto the floor. The ice build up in the bottom of the freezer was due to a failing/bad defrost controller. Behind the back white wall in the freezer compartment exists the cooling fins along with a heating element underneath. Due to moisture that comes into the freezer from opening it, frost/ice builds up on the cooling fins. Thus the defrost controller turns on the heating element to melt the ice/frost off of the fins which then drips into a metal pan which channels the water to a drain hole which drops into the drip pan underneath the fridge next to the fan. The problem is that the defrost controller doesn't keep the heating element on long enough or the cooling cycle comes on too soon thereby freezing the water and plugging up the drain. I had my defrost controller replaced (just outside the warranty period!) and it worked for about 1-month and then same thing happened again. Instead of paying for another defrost controller that would probably not work 100% my serviceman used the old paper-clip trick. He took a paper clip, stretched it out and then wrapped one end around the heating element and placed the other end into the drain hole. Thus when the heating element comes on the paper clip keeps the drain hole warm/hot and prevents the water from freezing. It has been 9 months since this fix and I haven't had any ice pooling in bottom of the freezer.

Jun 22, 2009 | LG LRFD25850 French Door Refrigerator

2 Answers

Coils freezing up on a/c unit


hi thanks for the question i would check the air filter this is a must it has to be kept clean the only other reason is if your trying to keep the room too cold the unit.has to shut down to let that ice melt so if your trying to keep the room too cold it will never shut down don't try to get 68 degrees

Sep 27, 2008 | Heating & Cooling

1 Answer

Dehumidifier freezes up


Most dehumidifiers need warmer air to work properly. The temperature in a basement is usually 60 - 65F; too cool for standard models. You could buy a "basement" dehumidifier. They're designed to work at lower temperatures; some as low as 40 F. Costs are about the same as a standard dehumidifier; you just have to find it.

For a cheap fix, try this; it seems to be working for me.

Since the condensate coil (the one icing up) is cold, the air entering it is too cool and the condensate frosts up the coil. Additional condensate freezes to the frost and before you know it, you've got a block of ice. Since the air coming out of the front is very warm take a large piece of cardboard around 6' x 3') and form a V. Placed it in front of the dehumidifier so it channels some of the warm air back to the rear where it warms the moist air up before it hits the cooling fins. It's helped keep the ice down.

If you want something attractive, any screen that redirects some of the air back to the rear will work. Just leave the top open so it doesn't get too hot and the some of the drier air gets out into the room.

Jul 02, 2008 | GE AHG40LJ Dehumidifier

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