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Airconditioner is on all the time now, but frosty ice is forming on the coils. The air coming out then becomes cool, but not cold and then we have to turn it on to fan in order for the ice to defrost...as soon as that happens then the airconditioner is able to blow out cold air again.

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Most airconditioners will have a cutout or something called a defrost cycle, which turns it off for a while to let the ice melt. And if you run it flat out all the time this may happen too (happened to me in Thailand once, so I just turned it on when I was in my room - and it worked much better)
If it has just started doing it, the recycle timer may need repairing

Posted on Jul 10, 2008

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Why isn't it heating?


Because its an air conditioner, not a heater?

May 03, 2015 | Heating & Cooling

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Why is Ice Forming on my Heat Pump


Many people have heat pumps and never realize that ice can form on the outdoor unit. Some have seen ice on their heat pumps but do not know how much is too much until they have a problem with not enough heat. Still others have a backup heat source and never know that they have a problem.

First off lets establish that heat pumps will form ice on the outdoor unit, usually whenever the outdoor temperatures go below about 40 degrees F. This threshold for ice depends a lot on the humidity of the air outside. If it is raining or snowing, the ice will form much more readily and rapidly. It is normal for ice to form on the outdoor unit because it is the cold side of the system when it is running in the heating mode. Because of this cooling, if the outdoor temperature is near or below freezing and there is moisture in the air, it will condense and freeze on the unit.

To keep the ice from building up to the point where it stops all the air flow, the outdoor unit will have a defrost timer board. This operates in conjunction with a sensor. Every 30 – 90 minutes the board will check the sensor. If the sensor tells the board that ice has formed on the coil it will then change the unit over from heating to cooling. This will make the outdoor unit the hot side for a short time to melt away the ice. While it does this, the unit will also energize the back up heat which is often an electric coil or a furnace. This will keep the inside air from blowing cold while the unit is defrosting.
When the sensor feels the coil temperature at about 50 degrees F it will then tell the board to return to the regular heating and switch the coils around again.

If this process fails to work for some reason the outdoor coil will become a big block of ice and look something like this.

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When your outdoor coil becomes totally frozen over it stops all the air flow through the coil and stops the heating process. In extreme case it can be very difficult and becomes a very long process to defrost the coil. You need to practice a lot of patience and care when defrosting a badly frozen coil. A torch or preferably a heat gun (hair dryer) can be used to speed up the defrost process. If it continues to occur the timer needs to be set to defrost more often or either the timer or the sensor has gone bad.

http://www.fixya.com/support/r3563896-air_conditioning__cleaning_the_condenser

http://www.fixya.com/support/r3636724-r_410a_new_refrigerant_air_conditioning

http://www.fixya.com/support/r3636751-air_conditioner_seer_seasonal_energy

on Jan 30, 2010 | Heating & Cooling

1 Answer

It's forming ice


The condenser, cold coil, is getting too cold, "freezing up. Usually this is because the small tube that comes out of the temp. control is not in good contact with the coil. This problem is aggravated if the fan is run on too low a setting. To clear the problem cut off the cooling and just let the fan run. The warm air will eventually melt the ice and you will suddenly start getting a much larger volume of air flowing. Now turn on the cooling cycle and try operating the blower at a higher speed.

Oct 04, 2012 | Heating & Cooling

1 Answer

Our airconditioner is not pushing cold air but it is running....the vents have little air coming o ut but not a lot and the house is not cooling.


Check the filters . It sounds as though its iced up. had the unit been running for a long period of time? If so you might see ice on the indoor coil . If so shut down the cooling leaving the fan on to help deice the unit . If it ices up again then you may have a fan that is running slow or a coil that is plugged with lint due to inproper filter service .. check the coil for ice and let me know.. Jon

Aug 07, 2011 | Goodman CKL36AR36 Air Conditioner

1 Answer

My everstar portable airconditioner is not cooling down my apartment at all, and there is ice forming in the back


Yep its soundss iced up shut it down and leave the fan on if you can. remover the filter and clean it you might have to wait for the ice to thaw from the coil to remove the filter. wash the filter out well set the thermstat to 70 degrees and leave it there, also close any unused rooms if possible check/ wash filter monthly

Jul 19, 2011 | Heating & Cooling

1 Answer

Goodman/Amana air handler freezing up and not cooling home. What could be causing it?


Hi,
There are two things that cause freeze up's...

Low air flow...

Low freon...

First check the filters, the blower , and the air vents to make sure that the air handler unit can move enough air...not enough air across the coil, the coil gets too cold, ice forms....


The low freon problem will require professional assistance...
For the system to be low there needs to be a leak...the leak must be found and repaired or the fix will only be temporary...
To do this the system refrigerant must be recovered, the leak fixed and then the system vacuumed and recharged...

One other thing....outdoor air temperatures under say 65 F can also cause freezing.... but I am assuming that you are above that if you are running your A/C system.


AirConditioner Trouble - Review the Possibilities

heatman101

May 25, 2011 | Amana Heating & Cooling

1 Answer

I got LG fridge freezer my freezer has ice building and the temp is warm WHAT COULD BE THE PROBLEM. kclakhani@hotmail.co.uk


your defrost system isnt working and you cant blow cold air thru a solid block of ice,remove the rear panel inside the freezer and check the evaporator coil for this type of ice buildup,they should only have a light frosty coating on them when the units cooling and not defrosting,then either the heating element below the coil is bad,the defrost thermostat on top of the coil is bad or the defrost system isn't getting power to operate

Nov 14, 2010 | LG Refrigerators

1 Answer

Airconditioner has weak cooling power.


if all the coils on the out side and inside units are clean and the fan motors are running fine it sounds like it could be low on freon

Dec 11, 2008 | Heating & Cooling

1 Answer

1999 Kenmore side by side fridge not cooling


You're frosting up due to either: bad defrost timer/heater or low gas. I'm assuming that you completely defrosted the unit, that there are no open liquids inside and the door remained closed most of the time to remove the threat of excess moisture in the box.

Defrost timer issues:

The unit should 'rest' about 1-2 hours a day where you don't hear the compressor and the unit should try to melt the ice. It has a heater to do that. The timer or the heater or a connection could be bad.

More likely: you've got a low gas situation. The way to check is that the compressor should come on at some point. Check the larger tube. Is should get frosty and then clear off or stay wet. It might even dry off. If it remains frosty...you're low on gas. Depending on the type of gas you need...it may be R 12...they unit may be unrepairable by other than a licensed tech.

Jun 12, 2008 | Amana 22.6 cu. ft. Side-By-Side...

1 Answer

Refrigerator won't get cold


You likely have a defrost cycle failure. The freezer's cooling coils need to be frosty and cold so the air that the fan pulls over them can cool the fridge section. If the defrost cycle fails, the coils freeze up to a block of ice and air flow suffers (fridge is about 55 degrees F). The freezer stays cold only because there's a block of ice in there now... sometimes that cold "sinks" to the bottom and only the food at the bottom stays frozen (and can even freeze food at the bottom of the fridge compartment while the rest is warm). To be sure, you'll need to take the rear interior panel off the freezer back wall and check the coils to see if they are frozen solid. If they are then there's a defrost cycle failure. If they are showing a nice white frosty pattern evenly all over the coils then that's normal and maybe the evap fan (right above the coils) is not blowing air up properly or is not working at all. That fan should run if the compressor is running, etc. the only time it doesn't run is during an actual defrost cycle. Once you find out what condition the coils are in it should be simple to direct you further on the problem.

Jan 05, 2007 | Maytag 22.6 cu. ft. Side-By-Side...

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