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Lonnie: Is your refer in a slideout? If it is, you may also have some insulation that had / has fallen and is blocking the airflow up to the upper vent. I know on mine insulation had fallen and jammed the small fan that was there. Now, I actually have two small Computer case fans that run inside pushing air from the bottom up. Originally there was a single small CPU fan and it wouldn't cool for anything in the NM or KS summer heat; now I have to watch that I don't freeze stuff in the refer section. By the way these fans are thermostatically controlled by the same thermostat that the original cpu fan worked off of. The item was a kit called something like 'slideout accessory kit' and Dometic had it for their units.
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