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Air conditioner is frosting up. Air temperature outside is not below 65......in fact it is more like 75, bnut inside because of the humidity it is around 80. it is less than a year old and only ran for 3 weeks last year. Puzzled

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Frost is caused by the refrigerant pressure being too low on the low pressure side of the system. That is, the compressor has more ability than the cold coil is using up. This can be caused by insufficient air flow over the cold coil or a shortage of refrigerant.

Insufficient air flow can be caused by a dirty coil, filter, or blower wheel, or collapsed ducts, to name a few. It is most likely that some of the refrigerant has escaped and the leak needs to be repaired and the refrigerant topped up to the right amount. You'll need to use the proper gauges, a good thermometer, and read the chart that is glued inside the access door on the condenser, or...check for any available repairs that are free because of your warranty.

I did know of a Sears 5,000 BTU window air that was simply designed wrong, but that was many many years ago.

Posted on Jul 22, 2008

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WHAT IS THE MINIMUM TEMPERATURE OF COOLING


most home air conditioners go as low as 18 c but this low setting achieves nothing but a high power bill
the purpose of air conditioning ( air conditioning -- to condition the air) is to remove the humidity ( water vapour ) form the air and allow the body to perspire more freely and so is by the evaporation of the perspiration of the body water that cools the body
this evaporation is hastened by the fact that the water vapour in the air is very low due to the air conditioner operation of conditioning the air
Now knowing this fact it is obvious that all the windows and door should be kept closed ( to remove the humidity from the room /house and so a setting of 25-26 c is sufficient to keep you cool
because the temperature difference between outside air and room air is low the air conditioner cycles less frequently and costs less to run
if the room setting is at minimum and the atmospheric temp is high then the air conditioner is running virtually all the time
so instead of asking what is the minimum temp you should be asking what is the optimum temp run to be conformable and to save on power costs

Jun 26, 2015 | Heating & Cooling

1 Answer

My Maytag A/C is blowing out white smoke. What should I do? Is it blowing something in or is it something inside it? I had it on 75 degrees and on high cool.


If it's blowing very MUCH of it, then it's coming in from outside. There's very little inside an air conditioner that could possibly generate smoke, and VERY little that could possibly generate any LOT of white smoke.

Now... it's POSSIBLE, if your humidity is high right now, that it's blowing cold enough air to condense the humidity in the air, causing an actual cloud (just like the ones in the sky) inside your house. That can happen only when the humidity is very high, though.

Aug 01, 2014 | Maytag Heating & Cooling

1 Answer

How do i get my portable haier air conditioner cool off my house below 73


Air conditioners can only drop the temperature of the room temperature a maximum of 15 to 20 degrees F. A 95 degree F room temperature can drop to a maximum temperature of 75 to 80 degrees F. If the room temperature drops from 95 to 85 degrees F, Then the problem is having too small of a btu rating on the air conditioner or refrigerant has leaked out the sealed system which can affect the amount of cooling performance. You will have to buy a higher rated btu rated air conditioner if the temperature of the room drops by only 10 degrees F. Air conditioners are rated by how much heat that can be removed each hour. The more humid it is, the more work an air conditioner has to do. They cannot do more work than the btu rating that is listed on each air conditioner.

May 26, 2014 | Haier Heating & Cooling

1 Answer

Low side and high side readings


pressure readings vary depending on temperature, humidity, and other factors such as coil condition (inside and outside coils) ducting, other mechanical issues. The is no absolute readings for any one type of system, that said a ball park reading with an outdoor temp of 90deg and an indoor temp of 78deg it would be around 65 to 70 psi low side and 150 to 210 psi high side.

Sep 21, 2011 | Ruud Matching Split Air Conditioner

1 Answer

My a/c unit has a energy saver mode but the machine hasn't turned off at all for the past two days and our apartment doesn't even feel like the temperature it's set to be at which is 65...


I dont know what the temp is outside where you are ... but if you are asking for 65 that is a big request for a window unit. Typically, you can expect to get 20 degrees lower inside than outside ... 65? That is a lot to ask. It will not shut off until it gets to the requested temp.

Sep 03, 2011 | Comfort-Aire Heating & Cooling

1 Answer

Unit not cooling house below 80 HELP ME PLEASE


It's 98 outside ... that says a lot. The gurgling is an indication that you are getting a lot of water out of the air (dehumidifying). If the unit is sized just right, or just a little too small, it may be working perfectly well.

You don't say where you are, geographically, but much to the US has an air conditioning design temperature of 95 degrees F. That means at 95 degrees, the unit will run continuously. With a 50% outside air relative humidity, it should keep the occupied space at about 75 degrees F. The more humid the air, the more the unit works on dehumidifying and less on cooling.

Give it some time, wait unti the weather breaks and see if it doesn't run just like it used to. If you chose to call a technician, have him/her take temperature readings of the condenser entering and leaving air, the suction line temperature, the liquid line temperature, the inside supply and return air temperature (dry bulb and wet bulb) as well as high and low side refrigerant pressures. Before they make ANY changes to the system (refrigerant charge) have them explain what they found wrong and make sure you understand what they are talking about. Adjusting the charge under these conditions, will mess up your operation under normal conditions.

Jul 20, 2010 | Whirlwind FH-778 Air Conditioner

1 Answer

Works well but


Yup, they eat energy.

An electric dehumidifier includes a refrigeration cycle that is very similar to a window AC units and refrigerators. They cool the air in the basement to condense and collect water and remove humidity, heat the air as a required consequence of the refrigeration cycle and dump it back to your basement.

Two sources of humidity in basements include warm outside air that naturally cools due to below grade earth contact and water passing from the ground though the floors and walls and evaporating into the basement. Dehumidifiers do most of the work in the summer when higher temperatures outside enable air to hold more water content.

In the winter, cooler outside air contains less moisture by weight eventhough it may be raining and the relative humidity in basement will be less because the air is warmed relative to the outside. The lower moisture content in the winter also absorbs the water passing through the walls and floor.

From an energy perspective, you may want the humidity set NOT below 50%. This will keep humidity below the level mold desires, but prevents the dehumidifier from doing more work and eating more energy than needed. A cheap battery powered temp/humidy meter left in your basement will help. Sources that include the "mold triangle" (temperature, water & food) often separate fact from expensive hype.

If the dehumidifier doesn't keep up, consider adding a moisture barrier to the basement walls and floors such as Dry-lock and floor paints to ****** moisture entry. Moisture barriers act very similar with water as insulation does with heat. They don't eliminate the need for a dehumidifier, but they reduce the work they do and energy they eat.

Oct 02, 2008 | DeLonghi DH40P Dehumidifier

1 Answer

Heat Pump


Your inside cooling coil in the air conditioning mode could be frozen over. Change the fan setting to on and operate it that way when in the cooling mode. Turn the air conditioning OFF with the fan ON to clear the coil of frost which should take about 1 hour.

The fact that you have sweat on the large line means that the temperature of the gas inside the line is below the due point of the moisture in the air. A good tech would measure the pressures and temperature of the system to get what is called superheat to determine proper system charge of refrigerant.

Jun 14, 2008 | Heating & Cooling

1 Answer

Humidity


Square footage of the studio should give the size of the air conditioner necessary to remove the moisture from the air. In order to remove the moisture the unit a/c has to operate with the coil temperature below the dew point of the air. If the air conditioner is to large for the job it will not run in the cooling mode long enough to remove moisture.

May 09, 2008 | Samsung AS18A6RB Air Conditioner

5 Answers

Dehumidifier frosts up


A dehumidifier will often frost up if room temperatures are colder than about 65 degrees F. If your room temperature isn't this cold, airflow to the unit may be restricted or blocked entirely. 1) Be sure the unit is set far enough from the wall so that airflow isn't restricted. 2) Clean the evaporator coils. To do this, unplug the dehumidifier and take off the outer cover. Allow excess moisture to evaporate from the coils. Then, using a brush attachment on a vacuum cleaner, remove all dust buildup. If necessary, cover the motor and electrical parts with plastic sheeting and spray with water.

Jan 18, 2006 | Fedders A7DH65B2A Dehumidifier

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