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Old 05-26-2014, 04:42 AM   #11
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My "Rule of thumb"

Set thermostat 10 degrees below outside air temperature, but in no case lower than 90 degrees if it is over 100 outside. It will feel great because of the reduced humidity and will allow the compressor to cycle like its supposed to.

If the compressor runs constantly, it will ice up and reduce air flow.
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Old 05-26-2014, 05:30 AM   #12
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I agree on humidity ... the coils will indeed freeze if it is "gawd awful" humid. Allow it to cycle by setting the temp a little higher with fan remaining on constantly
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Old 05-26-2014, 10:16 AM   #13
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Thanks for the tips. If there is one thing that we have down here in Houston, it is humidity...and heat. It got to 90 degrees yesterday. The humidity was ok but it was there.

I'll give the ac a run through the next time we head out in a few weeks as we are home from our weekend trip. We sure love to camp!
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Old 05-27-2014, 05:26 PM   #14
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IF you've had this unit for 15 months and have not cleaned the coils yet--I would highly suggest that you do so. Clean coils will make an A/C unit run much better whether the unit is on your camper or your home. Cleaning the coils of an RV A/C unit is not that hard. There are some good tutorials on Youtube and other sites.
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Old 05-27-2014, 05:30 PM   #15
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Thanks - I did some research on what I need to do and will knock it out before our next trip. I did take a look from the inside - all of that looked fine. I'll need to hop on the roof and knock that end out as well. Seems easy enough!
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Old 05-27-2014, 05:41 PM   #16
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Quote:
Originally Posted by Herk7769 View Post
My "Rule of thumb"

Set thermostat 10 degrees below outside air temperature, but in no case lower than 90 degrees if it is over 100 outside. It will feel great because of the reduced humidity and will allow the compressor to cycle like its supposed to.

If the compressor runs constantly, it will ice up and reduce air flow.
That will never happen. You could set it at 75 and let it stay on. If your unit is freezing up your low on freon and wouldn't notice it at 80 but 100 yes. Thats because of the liquid in your condenser coil. When it changes states. from gas to liquid again.......
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Old 05-27-2014, 08:16 PM   #17
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I took a trip to Crooked River S,P in S. Ga. this weekend past, and it was 95 degrees when we arrived at 3 30pm. I turned on the 13500 dometic ducted unit to high cool "on", but forgot to change it to auto, and after the next few hours, the ac felt a bit warm to me. Remembered the "auto" mistake, set it to auto and after about 45 min to 1 hour it was okay again. (it's set at 74) I think the coils were freezing up, but on auto, it turns on and off as needed, allowing the coils to defrost between cycles. Also, We had 2 Coleman popups before this V lite, and they would freeze up overnight almost every time set on low. I started running it on high, and turning the temp up some, so we didn't freeze, and that fixed the issue. Just some observations that I have made......Randy
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Old 05-28-2014, 06:03 AM   #18
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Originally Posted by 08flagvlite View Post
I took a trip to Crooked River S,P in S. Ga. this weekend past, and it was 95 degrees when we arrived at 3 30pm. I turned on the 13500 dometic ducted unit to high cool "on", but forgot to change it to auto, and after the next few hours, the ac felt a bit warm to me. Remembered the "auto" mistake, set it to auto and after about 45 min to 1 hour it was okay again. (it's set at 74) I think the coils were freezing up, but on auto, it turns on and off as needed, allowing the coils to defrost between cycles. Also, We had 2 Coleman popups before this V lite, and they would freeze up overnight almost every time set on low. I started running it on high, and turning the temp up some, so we didn't freeze, and that fixed the issue. Just some observations that I have made......Randy
You are correct turning the indoor temp up at night and when the outside temp drops to 60 or below you could freeze your coil. The auto or on should not affect the compressor at all being it will still cycle in the on mode, that just keeps your fan blowing. which might even help from freezing the evaporator. You can only at best get a 15 degree diff. from the temp in the trailer to the output. As your units starts to cool down the supply air will also drop. So lets say your temp in the trailer was 80 degrees the a/c will be at about 65 coming out. The lower the trailer temp return air the cooler the air will be.
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