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Old 07-23-2011, 08:04 PM   #11
Join Date: Jan 2011
Location: Manassas, VA
Posts: 51
It's miserable here too. The kids didn't even want to play in the sprinkler. It's the 150th Anniversary of the Battle of First Manassas/Bull Run and there are thousands of reenactors in full period dress - which means wool uniforms in 100+ degree weather. Just thinking about it makes me start to sweat. Ugh.

Chris, Karen and the 3 boys
2011 Rockwood Roo 233S
2008 Sequoia 5.7L
Manassas, VA
2011 camping days booked - 18 and counting
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Old 07-23-2011, 11:51 PM   #12
rrdrtravelers's Avatar
Join Date: Jun 2011
Location: Waxahachie
Posts: 64
Originally Posted by grhodes50
I've had the tt plugged in the last couple of days so I could run the AC. Temps have been in the mid 100's and I wanted to see how well it would cool the tt. Even with the tt under cover the AC has ran constant during the day.

The fan AUTO setting runs the fan on LOW whenever the actual room temp is within 4 or less than the set thermo temp. The LOW fan setting can't keep the tt cool in these temps.

So the AC fan automatically switches to LOW when it gets within 4 of the set thermo temp, but the temp will rise above the 4 difference with the fan on LOW, so then it will switch back to HIGH, cool back down etc..., but it will never reach the set thermo temp when back on LOW.

This morning I set the fan to HIGH and it is keeping the trailer much cooler so far. Of course the fan runs constantly now, but the AC compressor does cycle on and off.

Right now the outside temp is 103.8. I set the thermo at 78. The living/kitchen area, where the AC is located, is at 76 and the front bedroom is at 79. The thermo is located in the hallway close to the bedroom.

Just thought I would post this info just in case it might help some of you experiencing the same in these hot temps.

Picture of Dometic Digital Thermostat
I think I had read something about this on another thread and tried it too. You are correct, high will cool better. I usually start on high when we set up to cool things down then switch to auto at night.

2011 Cedar Creek 36RE
2002 Ford F350 Crew Cab 4x4
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