Question about Whirlpool CA24WCR Thru-Wall/Window Air Conditioner

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Return fins on front of unit (behind air fliter) continue to freeze up.

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You may need freon, but don't attempt it yourself...

How to add Freon to a Air Conditioner or Refrigeration System

Here is a tip about troubleshooting your air conditioner...
There are many things that can cause your air conditioner not to cool…

Air Conditioner Trouble -Review the Possibilities


Posted on Aug 21, 2010


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Related Questions:

1 Answer

Freezing up inside my a/c unit

Often that is a sign it is low on refrigerant. It can also be due to low air flow due to either a dirty filter or dirt obstructing the fins (coils) behind the filter.

Jul 23, 2012 | Haier 5,000-BTU Mechanical Window Air...

1 Answer

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

Units runs but cool air will stop even thou blower continues to run after several minutes cool air starts again

Check the theremostat probe to see if it may be too close to the evaporator fins behind filter if touching fins it will feel evaporator being cold before room air and send model number too, Sea Breeze

May 21, 2010 | LG Electronic Window Air Conditioner

1 Answer

Does not freeze there is frost on the first 3 to

the freezing tells me that the unit is working but something is blocking the airflow. It is either a fan not pushing air over the coils or it is working and dirt is keeping it from blowing past the coils

Nov 25, 2009 | Refrigerators

1 Answer

Freezing up

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.

Jun 29, 2009 | Kenmore 75085 Air Conditioner

1 Answer

Freezing up, home ac unit no air flow after running a while

A low freon level in the unit can cause them to freeze up. Are the fins behind the filter clean?

Jun 19, 2009 | Whirlwind FH-778 Air Conditioner

1 Answer

Central air

HEY_ 2 viable options suggests them self to me, 1 - low airflow ----------2 low on freon charge! Thank-you-very-much!

Aug 30, 2008 | Whirlwind FH-778 Air Conditioner

3 Answers

Freezing after few hours.

is the filter clean? If not then the fan cannot draw air thru the coils to exhaust moisture.. and will build up and freeze ..

Aug 22, 2008 | LG L1204R Air Conditioner

1 Answer

It keeps freezing over in a short period of time.

I am guessing that this is a window mounted unit??

The main reason for an air conditioner freezing over is that it is not getting enough air flow. You should replace your filter, make sure not to fold over any of the soft metal fins, you may also have build up in these fins and that too will restrict air flow and cause the unit to freeze up.

If this is central air, then the same thing is true, start with the filter, but remember that you need to let the system breath. Do not close off to many vents in your home thinking that you are going to save money, in fact this can cause your power bill to increase because the system has to work harder and hotter.

If the unit continues to freeze up, you should have a certifed A/C tech come out and take your air conditioner apart and clean it. If it's a window unit it might be better to just replace it all together.

Hope this helps your problem,


Jun 29, 2008 | Heating & Cooling

1 Answer

Hums and freezes up????

The fan motor must have been stopping. If the fan stops, for sure the fins will freeze because there is no air flowing. common Fan motor problems defective bearing or bushing and starting condenser. If the bearing is defective, it will heat up and seize. Have the fan motor checked. The fact that the fins are freezing, means that there is enough freon and the compressor is working.

May 29, 2007 | Frigidaire FAS155K1 Air Conditioner

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