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11-26-2019, 06:29 AM
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#1
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Senior Member
Join Date: Apr 2018
Location: Tonasket
Posts: 127
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Furnace and Air-con together
I've got a new question to ask our members.
I'm having to live in my trailer again for the winter
in eastern washington.
When I turn on the furnace for heat , both the furnace
And over head Air Con turn on.
Why ? Any suggestions ?
__________________
2018 Keystone Bullet Premire ultra lite. 19FBPR.
2016 Chevy Silverado , 1500.
5.3 liter V8
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11-26-2019, 07:31 AM
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#2
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Senior Member
Join Date: Jan 2012
Location: Central San Joaguin Valley, CA
Posts: 2,117
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Make sure that the fan switch on your thermostat is set to "auto".
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Jack & Marty
2018 Laredo 298 SRL
2011 F-250 SB Crew Cab 4x4 6.7L
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11-26-2019, 07:41 AM
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#3
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Senior Member
Join Date: Apr 2018
Location: Tonasket
Posts: 127
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Furnace/air con
It worked , thank you , thankyou.
Thought I was going to freeze to death last night.
__________________
2018 Keystone Bullet Premire ultra lite. 19FBPR.
2016 Chevy Silverado , 1500.
5.3 liter V8
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11-26-2019, 03:12 PM
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#4
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Senior Member
Join Date: Jul 2013
Location: Box Elder
Posts: 2,907
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Even if the fan were running while the furnace is on, the compressor is not running, so the fan would just be circulating the air inside the trailer, not cooling it.
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Bob & Becky
2012 3402 Montana
2012 Chevy 2500HD D/A CC
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11-26-2019, 04:13 PM
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#5
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Site Team
Join Date: Mar 2011
Location: Gaylord
Posts: 26,981
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The "auxiliary fan function" was added several years ago by Dometic to supplement the furnace heating inadequacies. If you think about it, "heat rises" and there's no "true circulation from the top" in a heat only situation. The vents are on the floor and the return air is in a cupboard or a grate under the refrigerator. Then, there's the issue of "limited airflow" any distance from the furnace. So, when first starting to warm up a cold trailer, there's minimal airflow through the furnace system and it seems like a "forever with no heating improvement" situation...
In comes the air conditioner with its more powerful fan.... Turn the thermostat fan switch to LOW and the hot air at the top of the main cabin is collected by the air conditioner and pushed through the roof vents to the far ends of the trailer... Once the trailer is warmed up (10 or 15 minutes) turn the thermostat fan switch to AUTO and the A/C fan stops blowing air, allowing the furnace to then maintain the trailer temperature....
It's not a "full time system" but a way to augment the furnace to move a lot of air quickly when first warming up the trailer.....
Some like it, some: well not so much....
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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11-26-2019, 06:25 PM
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#6
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Senior Member
Join Date: Feb 2019
Location: Wickenburg
Posts: 3,304
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For those of you with inCommand units, note that "auto" is the only way to turn the AC fan off. If you set the fan to "off," it runs on low. Really! Who designed that?
__________________
2019 Cougar 26RBSWE
2019 Ford F-250
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11-26-2019, 06:33 PM
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#7
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Senior Member
Join Date: Jul 2017
Location: Monroeville
Posts: 1,549
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I don't love to run the overhead fan much; I personally feel like it cools the trailer off faster than it heats it.
__________________
2014 Bullet Premier 29bh in Charocal
2019 Ram 2500 HD 4x4, CC, 6.4L
2011 Passport 2510RB (Sold)
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11-26-2019, 07:02 PM
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#8
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Junior Member
Join Date: Nov 2019
Location: Hatfield
Posts: 5
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In addition to circulating the warm air would it have something to do with bringing in some fresh air to offset carbon monoxide?
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11-26-2019, 07:03 PM
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#9
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Senior Member
Join Date: Feb 2019
Location: Wickenburg
Posts: 3,304
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No it's just a circulating fan on the air conditioner.
__________________
2019 Cougar 26RBSWE
2019 Ford F-250
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