Tip & How-To about Heating & Cooling

Air Conditioner Ice Air Conditioner Problem

If you are experiencing the problems caused when your air conditioner becomes a solid block of ice then you need to figure out the real reason why it does or is doing that.

There are a few things that can happen to cause this unpleasant happening.

  1. The air flow over the coil is choked off to the point where the coil starts to become to cool because not enough air is flowing over it to keep it warm.
    1. Check air filter, if dirty clean it. (This is a very common problem)
    2. Check supply vents in building to make sure enough are opened to allow air flow.
    3. Check blower motor to see that it is operating at full speed.
    4. Return air temperature may be too cool. (below 65F)
    5. The indoor coil it’s self may be plugged with dirt. Clean with a good indoor coil cleaner.

  1. The outdoor air temperature maybe to cool which makes the indoor coil run too cold.
    1. Install a head pressure control to keep the high side pressures up.

  1. The unit may be low in refrigerant. This is often the first thing that gets the blame for causing this problem. Actually it should be the last thing to check after all the other possibilities are thoroughly checked.

If you have a coil that is froze up to a chunk of ice, then you need to remove power to the outdoor unit. Allow the indoor fan/blower to run to try to move air over the coil and thaw it out.
After the coil is completely thawed, then restore power and determine the cause of the freeze up.
A heat gun or hair dryer can assist in the deicing process. Towels and a wet/dry shop vac can help to keep the mess to a minimum also.

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1 Answer

air conditioner runs but no air comeing threw vents


Hi make sure the indoor blower is running first of all. Check to see where the blower motor is that it is not iced up. This happens when you don't have enough return air back to the unit. I have see these coils have a solid block of ice 4" thick on them. Check this and the motor and you will find the problem. You will have to de-ice it. Check the coil to see if it is dirty also. Clean if needed.
Shastalaker7

Jun 13, 2010 | Carrier 52CE215 Cool Electric Heat Air...

1 Answer

When the door to the freezer is closed there is a vibration noise from the icemaker. When the door is opened, it is quiet. Also, the ice is not forming solid Thanks


Possibly there is a 2 part problem you are experiencing. 1)That vibration i dont think is the ice maker. It is your evaporator motor. 2)The fact that the icemaker is not forming the blocks nicely could be because the freezer setting could be set a little to low. The freezer temp. is what freezes the ice maker blocks. You may want to play it safe and do a 12 hour defrost which may be the reason why the vibration is heard.and reduced freezer temp.

Jun 05, 2010 | Amana ABB1927DE Bottom Freezer...

1 Answer

UNIT ICEUP AFTER ONE HALF HOUR OF OPERATION


before you figure it's out of freon- there are coil cleaners you can get at a air condition contractor store. you should clean both the inside and outside coils. make sure both fans are running (in & out)

Apr 15, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Water Leaking


Dear Customer,
The likely reasons for a leaking AC are...
1) Improperly installed.
A window air conditioner must be slightly lower at the rear than the front. This allows the water being removed from the room to drain to the back of the machine. A difference of one inch is sufficient. This is always the first thing to check. Many are improperly installed in the haste to get relief from the heat. If installed too low at front the water will flow into the room rather than outside. If installed too low at rear, water can roll out front edges before has chance to exit towards rear drain.


  1. Icing up.
    Water being de-humidified can turn to ice if there are problems with the cooling system. There are many reasons for an air conditioner to produce ice. Remove front grille while machine is operating. If ice is present on the cooling coil you will probably need service. For more information see our other article: Why window Air Conditioners Ice up.


  1. Air leakage around air conditioner.
    If warm air is able to enter around the air conditioner it will encounter cooler, dryer air. When they meet condensation will occur. If water leaking from front of air conditioner inspect to see if dripping from body of machine, or water droplets clinging to front area. To test, operate machine for 30 minutes and then use flashlight to check under front edge of base. Small water droplets here indicate an air leakage problem. Add foam insulation to stop warm air from infiltrating.


  1. Drain hole blocked.
    Rear of air conditioner base has a drain hole or groove to allow water to escape. If becomes blocked water can back up. To test, operate machine for 30 minutes and then inspect if draining properly. If appears blocked use a small piece of wood to open drain hole at rear of metal base. CAUTION: Never be tempted to drill holes into the air conditioner body to relieve water pooling. Severe damage can result.


  1. Internal drains blocked.
    There are small passageways that allow water to drain from front of air conditioner to the rear. If they become blocked water will pool at front of machine and overflow onto floor. If this happens the air conditioner will require removal from window and servicing.


  1. Outside temperature too cold.
    This occurs at end of cooling season. If outside temperatures drops below 60 degrees Fahrenheit at night the cooling coil may ice up. If no leakage at bedtime but water in front of machine in morning, suspect this problem. If this problem suspected turn off machine before bedtime and restart as day warms. Alternately, operate machine at night with selector switch in ‘fan only’ position. This will circulate room air during night but not allow cooling.
Hope u find this useful. I'll be thankful if u could rate this. thank you.

Jul 10, 2008 | Samsung AW0505M Air Conditioner

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