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Old 12-13-2016, 05:35 PM   #21
Art-n-Marge
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Bad Moon, in my rig, it is impossible to run the A/C at the same time as the Furnace, since my climate control's mode switch options are Fan Only, Cool (A/C) and Furnace meaning the mode can only be one at a time.

When in Fan Only, the furnace fan circulates air from the furnace without heat or cold. Cool means the overhead A/C unit can operate and operates independently of the furnace, then finally when mode is set to Furnace, means the furnace fan can run and turns on the furnace heat as needed. There are other selector buttons for selecting other parameters such as automatic/low/medium/high fan in Cool mode depending in what mode you have selected.

I suggest you post all the selector buttons on your unit, then we might be able to help you decipher how it works. I, for one am already confused with your setup if you are able to have the A/C AND the furnace running at the same time. that doesn't seen right unless you have a truly automatic system that turns on the Furnace or the A/C depending on your settings. I lived in a house that worked this way and while it was nice and automatic, once furnace or A/C worked but never both.
 
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Old 12-14-2016, 05:50 AM   #22
Carl n Susan
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This is a common question by from owners of newer rigs. Here is one of many discussions which describes the problem and solution (Hint: fan on Auto) http://www.montanaowners.com/forums/...ad.php?t=63365

You really should have posted this questions as a new topic. This questions gets lost in a multi-page unrelated topic and will be difficult for others with the issue to find it. Plus use the "Search" tool in the upper right corner of the page. Most Montana problems have been asked and answered already.

As for Art-n-Marge, technology has passed you by. Your 10 year old rig has a completely different thermostat and technology.
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Old 12-16-2016, 02:55 AM   #23
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Thanks Carl-n-Susan. Actually found my answer on Youtube:
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Old 01-11-2022, 12:12 PM   #24
John5five
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I agree with you completely. Having HVAC in my blood and having a 2020 4811ms Montana, there should be a return duct and filter grill at the stairs for complete HVAC recirculation. This would be more energy saving and efficient imo.
The area around the furnace is around 45deg f and that's the air being circulated over the heat exchanger. With a 50 temp rise that's 95 deg supply air temp out the registers. It's not circulating room temp it's circulating basement area temp. Now if it were circulating room temp at say 70 deg F with a 50deg TR, ( my unit has a 50deg f temp rise) that would give you a 120 supply air temp out the registers. 120 very 95. See how much quicker you will maintain and hold a 70deg set point. If I could fit in there I would install a return duct to the stairs and restrict return air flow not needed. But that's me. I winter camp and propane and electric has become a factor. 😁✌️ Happy Camping
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Old 01-11-2022, 02:14 PM   #25
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I simply removed the wood covers, double duct tape from the back, and reinstalled them lol. Works for me plus we still have the wood look. 😁
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