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Old 09-20-2016, 06:01 AM   #1
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Dometic Dual Thermostat

Have 2016 Sierra 5th wheel
When turn on furnace a.c. runs and can not
Set 2 different temps??
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Old 09-20-2016, 08:04 AM   #2
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AC probably isn't running, just the fan. Try setting fan to AUTO.
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Old 09-20-2016, 08:14 AM   #3
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So is the fan suppose to run? I have it on auto
Why can't I set 2 different temp
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Old 09-20-2016, 08:20 AM   #4
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Quote:
Originally Posted by sharpei3 View Post
So is the fan suppose to run? I have it on auto
Why can't I set 2 different temp
Your thermostat is not like a house stat that allows an A/C temp to be set and a heater temp to be set. You have to set the temp for which ever mode you want to use.

The reason the A/C fan blows when you select heat is because you have the fan mode set to 'on.'
Set the fan mode to 'auto' and the A/C fan won't come on with the furnace.

Many people like that feature though as it distributes the warm air more evenly. (warm air rises)
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