Question about Kenmore 75085 Air Conditioner

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Coils behind inside filter freeze up resulting in a lower pressure air output at a warmer air temp

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Coils may need cleaning. Fan slowed down needs oiling. Low outside air temperature when this is happening.

Posted on Aug 05, 2010

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It is not holding temp. its range is 30 to 49 degrees in one hour


As a refrigerator, it should not go below about 34 degrees. If it is going down to 30, it may be freezing up on the coil. If you get a chance, do this: unplug the refrigerator and let it sit for 4 hours with the door open. If the coil is frozen it will defrost. You can feel the coils inside the box at the top back inside the unit. If you feel ice at any time it is an indication that it is getting too cold. Once the inside coils freeze over, the air can't flow through the coils and the unit will get warmer and warmer. When it is defrosted, set the thermostat just above the off setting. Let it run until the compressor shuts off. See what the temperature reads on a thermometer inside the cooler. If it is not cool enough move the thermostat one number colder and let it run an hour. Take your time, let it equalize before you change the thermostat. Also if the cooler is empty it is hard to set the thermostat because when you open the door all the cold air escapes and the temp will change rapidly. If it is full of cold food, opening the door won't change the temperature very quickly. Also check the radiator coils at the bottom of the cooler behind the grill. If it is clogged with dust or grease, the compressor may overheat and shut off prematurely.

Sep 21, 2010 | True T-49 Side by Side Refrigerator...

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Why does my A/C blow little to no air, that's not cold, and how do I fix it?


Air Conditioner freeze ups cause an A/C to blow little to no air through the vents, and the air is usually warm.

There are three basic reasons for air conditioner freeze ups:
  1. Insufficient air flow
  2. Low Refrigerant charge
  3. Outdoor temperature
1) The two most common causes of insufficient air flow are dirty filters and under sized ducts. A dirty filter limits air flow which in turn allows the cooling coil’s temperature to drop below freezing. Replacing the filter, monthly, usually alleviates this problem. Under sized ducts will also cause the system to freeze because it also limits the amount of air flowing over the cooling coil. This results in lowering the coil temperature and allowing the humidity in the air to collect on the coil and freeze.

2) Low Refrigerant Charge. The refrigerant system teeters on a delicate balance. If the system is not charged correctly, the system will not function properly. This malfunction may result in the poor cooling output and/or freezing up. Only a qualified, certified service technician can properly test and charge a refrigerant system. Check your small high pressure line (should be hot) and low pressure line (should be cold, but not frozen).

3) Outdoor temperature. If temperatures are too low, the system will not operate properly, and freeze up may occur. The outdoor unit does not function well in temperatures below 60 degrees F. A special “ambient temperature” control must be installed to allow the unit to run properly in cool temperatures, or you may open your windows and save energy. If the A/C is set lower than 70 degrees F, special adapters are required to be installed.

on Jul 10, 2010 | Heating & Cooling

1 Answer

My Kenmore 73069's inside fins often freeze up. I don't have it set very low: 75 degrees F. Why does this happen?


Your setting of 75F doesn't affect the freezing because it is a result of the boiling point of the refrigerant in the a/c unit. The lower the refrigerant pressure is, the lower the boiling point is and the refrigerant cools the coil to that temperature also known as saturation temperature. The 75F is what it lets the room air get cooled to before it shuts off. The freezing can also be caused by low air flow across the coil which can be caused by dirty air filters, dirty fan, dirty coil or fan not running/not running fast enough. So check your filters and the coil to make sure they are clean. Make sure the evaporator fan is running. Then you may need to get the refrigerant charge checked.

Jun 15, 2010 | Kenmore 73069 Air Conditioner

1 Answer

Frigidaire central unit freezing up leaking


The coil freezing can be caused by a couple of things. 1) Not enough air flow over the coil or 2) A low refrigerant charge. First make sure that the indoor fan is running. Then check your air filters and make sure your evaporator coil is clean. After that you can get the refrigerant charge checked. The lower the refrigerant pressure is, the lower it's boiling point is and when it gets below 32F then the evaporator coil and usually the low pressure line freeze up. The leaking you were talking about is probably from the ice melting. Hope this helps.

Jun 06, 2010 | Frigidaire Heating & Cooling

2 Answers

GE Profile refrigerator temperature problem


refrigerators have 2 coils. the evaporator coil and the condensing coil. one is on the bottom of the fridg and one is on the back or inside behind a false panel. these coils must be kept clean or if the condensing coil cannot reject the heat absorbed by the evaporator, the box temp will stay high and if the evap coil cant absorb heat the box temp stays low running the risk of freezing

Nov 26, 2009 | Refrigerators

1 Answer

My airconditioner lines keep freezing up


Your filter is plugged, or the refrigerant is low, or it is getting too cold outside overnight (less than 60degf)

1) The two most common causes of insufficient air flow are dirty filters and under sized ducts. A dirty filter limits air flow which in turn allows the cooling coil’s temperature to drop below freezing. Replacing the filter, monthly, usually alleviates this problem. Under sized ducts will also cause the system to freeze
Because it also limits the amount of air flowing over the cooling coil. This results in lowering the coil temperature and allowing the humidity in the air to collect on the coil and freeze.
2)Refrigerant charge. The refrigerant system teeters on a delicate balance. If the system is not charged correctly, the system will not function properly. This malfunction may result in the poor cooling output and/or freezing up. Only a qualified, certified service technician can properly test and charge a refrigerant system.
3) Outdoor temperature. If night time temperatures are too low, the system will not operate properly, and freeze up may occur. The outdoor unit does not function well in temperatures below 60 degrees F. A special “ambient temperature” control must be installed to allow the unit to run properly in cool temperatures, or you may open your windows and save energy.

Jun 05, 2009 | Heating & Cooling

1 Answer

Freezes over


If the coil is freezing up it's either a dirty filter, coil or low on refrigerant. Unless somebody went in and changed the fan speed to a lower speed.

Apr 20, 2009 | Heating & Cooling

1 Answer

Wall ac unit keeps freezing up inside.


No! You will not likely find any service on a product which has very little value. Frosting will sometimes happen if the outside temperature is to low. The outside ambient temperature is directly related to the pressures inside the refrigerating system. The lower the outside temperature is the lower the pressures will be in the cooling end of the air conditioner. In mechanical refrigeration pressures and temperatures are directly related.

Nov 02, 2008 | Goldstar WG5000 Air Conditioner

1 Answer

Air condition unit will not cool and the coils freeze up in just a few min.


Is the inside fan running properly? Typically if the condensor outside is working, but the fan inside is not, the coils will freeze up quickly. For the system to work properly, you need to be blowing warmer air over the coils inside the house- that then brings the temp of the refrigerant in the coils back up, and the loop continues. If the fan inside is not working, check to make sure that the circuit breaker is not tripped.

Jul 06, 2008 | Intertherm Heating & Cooling

1 Answer

Samsung 8000 btu window air conditioner


Air conditioners rely on a difference in pressure between the "high side" and "low side" in order to perform. Of course, a/c's are designed to work in the heat. Having a cooler outdoor temp of 70 degrees probably is not sufficient to maintain adequate head pressure and will result in reduced cooling capacity. Also, since it was 68 in the morning in the room, it is possible that the indoor coil began to freeze up. Basically, you have a cold coil that you keep warm by moving air over it. If the air doesn't have enough specific heat (what your thermometer measures) it can allow the coil to get colder than 32 degrees and the condensate from all of your humidity will begin to freeze on the coil. My recommendation would be to check the a/c on a day that is 80+ degrees. If you have an avarage indoor temp of 70 degrees you should be able to look for the air coming out to be approximately 20-25 degrees colder than the air being sucked in.

Jun 10, 2008 | Heating & Cooling

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