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Coil freezing up then the air flow is minimal

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Dirty filter or low on freon.

Posted on Aug 08, 2008

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The front of the unit behind the filter freezes up. Worked flawlessly for weeks but freezes up. Cleaned the filter several times but continues to do so.


the reason for the coil (behind the filter) to freeze up is 'low air flow' over the coil, which is usually caused by a dirty filter AND/OR the coil itself.
Be sure the coil is clean and not clogged up. Shine a flashlight into the fins and be sure it's clean.
If it is clean then you need to look at the fan motor. Is it blowing correctly? Is it cutting off at times?
Low air flow across the coil is the main problem with coils freezing up, although less likely is a 'low refrigerant charge.'
I would make sure the coil was clean and the motor was blowing air across it in the proper manner.

Aug 05, 2011 | Haier ESA3109 WallWindow Air Conditioner

1 Answer

The unit keeps freezing up solid even on energysaver


Change or clean the filter and clean both coils, no air flow or reduced air flow, the coil will freeze. It will also freeze if its set to cold 72 min. setting. Example if your room temp is 72 degrees, than the air will be 52, and the coil temp is 32 degrees, any moisture will freeze. Hope this helps

Jul 02, 2011 | Whirlpool Air Conditioners

1 Answer

My air condtioning unit is a GE unfortunately I can't se what btu but ev ry our the coil freezes and its spitting out water. Room size.


clean the coils its freezing up because the air flow is restricted because of dirty coil or filter after cleaning the coils and it still freezing up then it will need some refrigerant aka freon

Aug 19, 2010 | GE Built-In Room Air Heat Cool Air...

1 Answer

I have a Coleman Central Air Conditioner/Heat Pump. On the cooling mode the coils inside the unit in the basement continue to freeze up causing no air flow. I relpaced the filter thinking it might have...


The most common reason for freezing up is 'air flow,' and since you've already changed your filter - have you checked out the coil (the one that cold air comes from) to see if it's clean? If the filter you changed was really 'bad dirty' then it's a good bet the coil could be dirty also - thus restricting the air flow.

If you're satisfied that the coil is clean - about the only other thing it could be - is 'low on refrigerant,' which of course will take a Service Tech to find the leak, repair it and then re-charge the unit with refrigerant.

One other thing you might think about - are you running the blower motor on 'low speed?' If you are then put it on 'high' and see what happens.

Again, the most likely cause of your problem is air flow or 'low load,' - so I would really look hard for an air flow problem of some sort.

hope this has helped a little

Jun 20, 2010 | Air Conditioners

1 Answer

The coil in my furnace is freezing up. Can to fast of air flow be the cause. My furnace filter is a inexpensive filter. The gas levels are correct.


The temperature difference across the coil should be between 14-21 deg. Temperature taken near filter and
take temperature above the indoor coil. Not enough
air can cause the coil to freeze-up. Has this always
happened?

Jun 18, 2010 | Air Conditioners

4 Answers

My air conditioner coils continue to freeze up. i


If the indoor coil is icing up, you are either low on freon, or the indoor coil is very dirty. This will cause it to ice even though you have replaced the filter. See if the suction line/large copper line has ice on it on the outdoor unit. If so, its low on charge or the indoor coil has plugged up and not getting enough air flow across it. Please keep me posted.
Shastalaker7

Apr 17, 2010 | Goodman CLQ36AR49 Air Conditioner

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 | Air Conditioners

1 Answer

What causes my evaporator to freeze up


This can be caused by a few things.Check for a clean air filter. If the filter is dirty the air flow is slowed and lets ice form and over time the coils freeze over. The next thing to look for is a dirty evap coil. Same thing. if the coils are dirty the air flow is restricted and causing freeze ups. if this all looks ok then its time to call in the pro's. For environmental purposes all HVAC techs are citified to handel freon in the correct way. They will check the system for leaks and repair them followed by a freon recharge.

May 11, 2009 | Air Conditioners

2 Answers

My ac unit


air conditioners freeze up for one of 2 reasons, #1 restricted air flow, is the filter, /orthe evaporator (cool) coil clean?
#2 it is low on freon, causing the coils to be colder than they should be.

Nov 13, 2007 | Air Conditioners

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