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Old 05-25-2015, 03:31 PM   #11
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All RV's come with gaping holes to let unwanted outside air in.

1. Close off the laundry chute with foam insulation board
2. Close off air circulation into the cargo areas. (Lots of places where that happens.)
3. Seal up every crack and crevice you can find with "Great Stuff"... this is an all day project.
4. Get some of those "vent cushion" things. They work!
5. Keep unwanted sunlight (and heat) from coming into the trailer.
6. Try to park on a shaded site.
7. Keep your roof clean (as in reflective shiny white)
8. Shower at the bath house to keep humidity down.
9. Cook outside in the heat as much as you can stand it.

By making these mods we are able to stay cool with a 13500 BTU unit in a 30ft 5th wheel in the Georgia heat. Remember your a/c will only drop the internal temp about 20 degrees relative to outside. It just gets real inefficient about 95 deg.

Cool is relative.
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Old 05-25-2015, 04:31 PM   #12
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I have a 2015 Rockwoood 2608 ws. I have experienced the same problem down here in south Florida where it's pretty hot and humid already. But after hours if running I push the thermostat up to 85 and it still keeps running. I get up in the middle of the night to turn it off b/c we're freezing. I'm suspecting a thermostat issue. I hear rv ones are pretty cheap and many are replaced with a digital home unit. Sounds easy but since the rv is new and under warranty, I'd better let the dealer check it out which is another 1/2 hr drive then to go up and pick it. That is unless I get advice here that solves my problem. Thanks
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Old 05-25-2015, 04:48 PM   #13
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Quote:
Originally Posted by tomrob1161 View Post
When temperature is hot and humidity high, don't run your A/C Fan on auto, run it on High. This will help keep your coils from icing up and make your unit a lot more efficient. The fan will run constantly, but the compressor will run as needed. In the evening, when the temperature drops, switch the fan control back to auto.
I agree
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Old 05-25-2015, 09:52 PM   #14
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Remember you are not at home and your TT is not as insulated. Also depends on campsite as to whether you have a lot of shade or little shade. I was on the SC coast this weekend and pretty much in the open. Set my thermostat on 75 and my AC worked with no problem. Temps reached the lower to mid 80's each day. We left door open each day with screen open.
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Old 05-25-2015, 10:25 PM   #15
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Quote:
Originally Posted by tomrob1161 View Post
When temperature is hot and humidity high, don't run your A/C Fan on auto, run it on High. This will help keep your coils from icing up and make your unit a lot more efficient. The fan will run constantly, but the compressor will run as needed. In the evening, when the temperature drops, switch the fan control back to auto.
The A/C fan will run high in auto till the temp gets to within about 4 degrees of selected temp and then switches to low. Don't see any advantage to not run in auto.
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Old 05-25-2015, 10:58 PM   #16
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Keep the cold air falling out the ceiling vents stirred up with fans. This is very important as there is not much to help temps inside if you are camped out in the full sun. I used the Gila window film from Lowes with the highest heat rejection and it made a HUGE difference especially in our slide out area.
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