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Old 08-30-2011, 09:31 PM   #1
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1966 26' Overlander
wagoner , Oklahoma
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Odd A/C problem

Can anyone tell me if they have experienced this. On my 66 Overlander, the "Summer" brand AC unit at times only gets one side of the evaporator coils cold. Always the same one and happens usually on "hi". the system works on low, I just never use it on low, so I cant tell yo if it happens there or not.. The thermostat it working good. The system as a whole works very well. Just a very noticible difference in the temp of the two sides. Sounds crazy but I have checked it enough times to know there is a difference. Has anyone had this happen, or am I alone in the universe?? lol. I truly appreciate everyones help.
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Old 08-30-2011, 10:27 PM   #2
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Oswego , Illinois
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Usually indicates a restriction in the evaporator. Actually pretty common on AC systems of any kind when they have some age on them. No cure that I know of.
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Old 08-31-2011, 11:27 AM   #3
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1976 Argosy 28
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The problem is that you're in Oklahoma. It would only be worse if you were in Texas this year. The reason it's different on the different fan speeds (worse on "hi cool") is that the greater fan speed moves more air across the coils, dumping the heat from the air in the trailer into the coils faster than your compressor can push refrigerant through. On the Lo Cool fan speed, you're just not moving as much air across the coil per unit time and the temperature differential from where the refrigerant enters the evaporator to where it exits won't be as great.

If you're able to keep the interior at a livable temp you don't have any other problems, just make sure the coils are clean inside and out and try to hang out on the side where the colder air comes out the vents... hopefully the weather's finally about to get back down to double digits!
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