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Old 05-01-2019, 03:54 PM   #1
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Brand: Thor Motor Coach
Model: Chateau 23U
State: Florida
Posts: 18
THOR #14489
Coleman Mach 3 Black AC fan runs all the time

Just got 2019 Chataeu 23-U
I would like to stop the fan when the AC unit reaches the desired temp. (Completely shut down with no noise.)
I did it with the last RV Dometic A/C unit.
Is it possible with the Coleman Mach 3 unit?
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Old 05-02-2019, 04:14 PM   #2
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THOR #908
mine has the auto/on option switch right on the thermostat
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Old 05-02-2019, 05:18 PM   #3
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Model: ACE 27.1
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THOR #7035
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Old 05-03-2019, 02:15 PM   #4
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THOR #7035
Sorry, Mach thermostat below. Is this what you have?
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Old 05-03-2019, 02:22 PM   #5
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THOR #14489
I have the roof unit, no thermostat, only options are fan (hi or low), or ac with fan (hi or low).
Thanks for your reply!
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Old 05-03-2019, 02:29 PM   #6
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Well then, that explains it. Every roof-top controlled AC I've ever had worked as you describe (fan on all the time). Maybe they were all Colemans. That's the way we like it rather than having the AC noise cycling throughout the night so on out thermostat controlled ACs we have always put the fan in the "ON" position anyway. I think you're stuck with that.
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Old 05-03-2019, 02:44 PM   #7
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Model: Chateau 23U
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THOR #14489
Thanks again for your input! I was able to quiet my last AC unit, a "Dometic" that had the same problem. I just wrote to Coleman, maybe they can help with this one.
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