Question about Dometic Rooftop RV Air Conditioner

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My 2007 unit don't get cold enough. the maximum outlet air is 60 degrees

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  • burzerko
    burzerko Jun 02, 2008

    I have a duotherm on a 2005 Sanpiper that is having the same problem. Mine is charged with 134a I have kept the condensing coils clean this has helped. I also try to park mine in the shade. This seems to help as well. welcome to the wonderful world of ozone friendly refrigirants.

  • James Helmer
    James Helmer May 11, 2010

    What is the outside ambient temperature? Is the unit parked in the sun?

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Ozone friendly refrigerants work on all the same principles as the old type of refrigerants. Outside ambient temperatures when higher will reflect on the cooling end of the system. Pressure and temperatures in any refrigerated device are directly related in all cases. Refrigerant charge to produce the proper output is critical in these units. Name plate is printed with a specific charge. If the charge is low the output will be less.

Posted on Jun 30, 2008

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1 Answer

I have my brand new frigidaire window ac unit set at 60 degrees Fahrenheit, so why does it only cool and keep the room at 65 to 68 degrees Fahrenheit?


if you have it set at 60 F and it is working at 65 to 68 F then that would be about right
as the air is cooled the cold air falls to the floor and out under the door, open window or anywhere else it can escape
the unit has to be at 80% room height so if it is set in a window then when the cold air gets up to the thermostat or ac level in the window then it will stop cooling
So if the ac unit is say 4ft from the floor and the ceiling height is 8 ft then the ac will only cool the bottom 4 ft
cold air does not rise but falls down
if you are using a ceiling fan then the cold air is stirred up and the 65F sounds about right
remember that the setting temp ( what you set it at) is the lowest temp that it will go down to before it stops cooling and if that is not reached it will keep working to attain that temp and if the room is too big, air leaks under door . around the fit in the window , no insulated walls , hot exterior wall,etc then maybe 65 F is the best you will get

May 09, 2016 | Frigidaire Heating & Cooling

1 Answer

When set to heat it blows out cool air.


Chances are your portable unit is a reverse cycle unit...If so, the leaving air temp in heating mode is not usually much warmer than room temp with 85 degrees F just about the maximum under PERFECT design conditions. A small portable in a large cold room may only be discharging 75 degree air, which is going to feel cold.

If your unit is NOT a reverse cycle unit, the heating source (probably electric resistance) is either not coming on at all or a portion of it is not coming on due to a defective element, burnt wire or a control issue.

Jan 08, 2015 | Amcor AL10000EH Portable Air Conditioner

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We have a new a/c and the system has heat strips. For a/c. we have had the thermostat set on AC at 72degrees. Now that it is getting colder and may need some heat in the house, do we switch the...


If your thermostat has an emergency heat setting this means you have a heat pump system.
Yes you need to set the thermostat to heat for heating the house.
The emergency heat setting should never be used unless your outside unit is not functioning.
The emergency heat setting overides the heat pump (the outside unit will not be energized).
The emergency heat setting will run the auxillary heat (heat strips) only.
When the thermostat is set in the heat position the heat pump will run to heat your house.
If the heat pump can't keep up (extreme cold) then then the auxillary heat will kick in to augment the heat pump until it satisfies the thermostat settings. If your room temperature gets 2 degrees below your thermostat setpoint, your auxillary heat will kick on. Example, say you are going to be gone a couple of days and you turn your heat down to 60 degrees. When you return and it is 60 degrees in your house, you turn the thermostat up to 70 degrees. Since you are turning the temperature up 2 degrees or more (10 degrees in this case) from the 60 degree room temperature then the heat pump will come on and the auxillary heat strips. The unit will continue heating like this until the temperature in the house gets to 69 degrees and the heat strips will turn off and the heat pump will continue to run until the 70 degree setpoint is reached.
Hope this helps.
SeagullAC

Sep 15, 2011 | Heating & Cooling

1 Answer

I recently purchased a used ac for my rv. it has two and one had gone out. the air coming out of the new one only gets down to 60 degrees while the air out of my old one is 50 degrees. they are both the...


No it means you 50 degree one is working better than perfect. Clean the one that is only getting down to 60 degrees but remember if a unit is dropping the air temp by 20 degrees its working fine. You ck this by cking the air at the intake where the filter is say temp is 80 degrees and then take a reading at a discharge vent where the cold air comes out if its 60 you have a 20 degree drop and that is considered good. If the unit was low on freon the unit will freeze up (ice will form on the inside coil).

Aug 10, 2010 | Dometic Rooftop RV Air Conditioner

1 Answer

Window ac unit only blows 60 degrees through vent should this be colder?


depending on outside air that pretty cold it should only be 20 degrees different

Jul 14, 2010 | Heating & Cooling

1 Answer

I have an LG AC and the lowest temperature setting is 60 degrees


Lowering the temperature setting doesn't change the temperature of the air coming out of the unit it just lets it run until the room temperature gets colder. Check the temp of the air coming out of the unit. If it isn't as cold as it used to be the charge could be low. First though you should make sure the filters are clean and the coils.You should also check the actual room temp. It's also possible the unit doesn't have enough capacity to keep up with the cooling load of the room.

May 02, 2010 | LG Heat cool Window Air Conditioner

1 Answer

How cold should it be in rv with two low orofile


Most AC units only change temperature approximately 20 degrees F from ambient.

Aug 17, 2009 | Dometic Rooftop RV Air Conditioner

1 Answer

Air is cooling but not as cold like last year!


If the air doesn't seem cool enough it is necessary to use a thermometer to check the difference in temperature between the air going into the unit and the air being blown into the room. Ideally, the temperature difference should be more than 15 degrees. For example, if the temperature going into the air conditioner is 80 degrees, the temperature coming out of the unit should be at least 65 degrees or less. If the difference is 15 degrees or more there is probably no cause for concern. If the temperature difference is less than 15 degrees you should check the following:

  • Air damper

Check to make sure the air damper is closed. If it's open, it will bring in outside air and reduce the efficiency of the unit.

May 28, 2009 | Hampton Bay Heating & Cooling

1 Answer

Samsung 8000 btu window air conditioner


Air conditioners rely on a difference in pressure between the "high side" and "low side" in order to perform. Of course, a/c's are designed to work in the heat. Having a cooler outdoor temp of 70 degrees probably is not sufficient to maintain adequate head pressure and will result in reduced cooling capacity. Also, since it was 68 in the morning in the room, it is possible that the indoor coil began to freeze up. Basically, you have a cold coil that you keep warm by moving air over it. If the air doesn't have enough specific heat (what your thermometer measures) it can allow the coil to get colder than 32 degrees and the condensate from all of your humidity will begin to freeze on the coil. My recommendation would be to check the a/c on a day that is 80+ degrees. If you have an avarage indoor temp of 70 degrees you should be able to look for the air coming out to be approximately 20-25 degrees colder than the air being sucked in.

Jun 10, 2008 | Heating & Cooling

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