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Dometic Quick Cool compressor freezing and evaporator coil

My Dometic Quick Cool compressor is freezing and evaporator coil was frozen. I allowed the unit to completely thaw. Once it thawed it worked great but after 45min. the unit was frozen. Does this mean the unit is low on freon? If so, since it's a sealed unit - how would you charge it?
Also, does it take R22 or 134?
Your help is greatly apprieciated.

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Could be low. First check air filter, air flow, and evap coil to see if it has restricted airflow. If all seems well, its probably low. The specs will tell you what type and how much refigerant. To access system, you will need a gauge/manifold set, refrigerant, and a piercing or line tap valve for the low pressure side of the system. Of course, first, you need to locate and repair the refrigerant leak.

Posted on Jul 27, 2009

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