Question about Dometic Rooftop RV Air Conditioner

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Compressorruns fora short time

My LG Intelloair window ac blows cool air till the desired temperature (say 25 degress) is reached & then stops. After that the room temperature starts rising again but the compressor doesn't start again till the temp is a good 5-6 degrees (30-31 degress) above what is desired. What could be the problem?

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The thermostat controlling your unit likely has a window type of programming for digital or mechanical adjustment for older style thermostat that sets a minimum off temp and a maximum on temp, there may be an adjustment to set the range it operates at, otherwise you may have a defective thermostat controller unit and it needs replacing also insure that the temperature sensing element is clean and free of dust build-up and your filter is clean

Posted on Apr 28, 2010

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Are you referring to 16 degrees and 34 degrees?
If you are, it is not possible to lower the setting to 16 degrees, 32 degreees is freezing, so the evaperator coil would start to freeze up, and as the ice spreads across the coil............... Air can not flow through ice, so the air will stop blowing, till you shut the system down for a couple of hours, to allow the ice to melt.
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I hope this helps.
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It sounds like you have the fan turned on. If you go to the stat, you should see an auto button, or switch for the fan. If you just switch it to auto, the fan will stop, and only start when the unit calls for it, hope that helps

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Hello Hamid,
The unit is designed to run the indoor fanmotors continuously when in cooling mode on both indoor units (evaporators). The reason is that this circulates the air and the temperature thermistor or sensor is able to sense return air temperature and in turn start or stop the outdoor unit and compressor as required according to the setpoint temperature. The reason for either unit not reaching setpoint temperature can be a couple of reasons. A) Incorrect design - the unit may be too small for the application. You can calculate this roughly at 650BTU per square meter of room in a relatively warm ambient climate. Or secondly B) The outdoor unit has leaked and is short of refrigerant. You can check this when the outdoor unit is running by feeling the thicker copper tube on the right hand side of the unit. This should be cool to cold. If no temperature difference is felt, it is short of refrigerant. Hope this helps you. Goodbye

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Go to www.mrslim.com. Look under the tab for library. Ib there you will find the troubleshooting guide for this model. Make sure the remote is set for cool and make sure the fan setting is not on automatic.

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