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Old 11-28-2021, 09:07 AM   #1
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Hi/Lo Fan Speeds on A/C

I have an older (2003) motorhome. The A/C's have a 2 speed fan that can be run independent of the compressor and even if the A/C is not even turned on.

Why would anyone want to run the A/C fans if the A/C isn't running also. It seems a frivolous feature.

Do you use your A/C fan? Do you select Hi or Lo speed?
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Old 11-28-2021, 09:14 AM   #2
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We'll turn on the fan if it's a bit stuffy in the RV, but not hot enough to need the air conditioner running. We'll turn on the fan just to move a bit of air because we like the way it feels.
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Old 11-28-2021, 10:24 AM   #3
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Right now we are running one A/C fan on low and a small ceramic heater to keep the RV warm without the furnace. It evenly distributes heat from one end of the RV to the other.

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Old 11-28-2021, 10:45 AM   #4
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Quote:
Originally Posted by yeloduster View Post
Why would anyone want to run the A/C fans if the A/C isn't running also. It seems a frivolous feature.
Some people prefer the fan running continuously, since the noise is from the fan and having it cycle is distracting. Or to circulate the air, which in my van is useful to keep the air temp more uniform with it mounted in the back.
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Old 11-28-2021, 02:40 PM   #5
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Have run A/C Fan only just to circulate air but usually just use the 2 Fantastic Fans for that...one blowing in/one exhausting
If using the A/C Fan it is on HIGH...Low is just noise

Just remember......
If A/C Fan is in Hi or Lo Speed vs AUTO and you call for heat the A/C Fan will also run when furnace does.
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Old 11-28-2021, 02:44 PM   #6
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...Do you use your A/C fan? Do you select Hi or Lo speed?
yup, quite often, actually. we'll open the door and the windows and then run the fans.
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Old 11-29-2021, 08:40 AM   #7
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Thanks for all the responses. Just to get clarification, the A/C fan DOES NOT pull air from outside, correct? It only circulates inside air?

They idea of using the A/C fan to aid distribution of furnace heat makes sense. I'll have to try that. However, the A/C fan is pretty noisy. I might not like the noise.

My A/C fan DOES NOT run when the furnace runs. Maybe my MH has alternate wiring!?
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Old 11-29-2021, 10:20 AM   #8
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Quote:
Originally Posted by yeloduster View Post
Thanks for all the responses. Just to get clarification, the A/C fan DOES NOT pull air from outside, correct? It only circulates inside air?

They idea of using the A/C fan to aid distribution of furnace heat makes sense. I'll have to try that. However, the A/C fan is pretty noisy. I might not like the noise.

My A/C fan DOES NOT run when the furnace runs. Maybe my MH has alternate wiring!?

A/C Fan circulates inside air...no outside air
*Same as furnace

A/C Fan running with furnace.....idea is to help circulate warm air at ceiling but it doesn't really help so not having it run when furnace is on is not a loss
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Old 11-29-2021, 10:28 AM   #9
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For the most part I run my ac/heat fan 24/7. Of course I have a basement ac unit. Not noisy but blows air Fromm roof. Set the ac to off when windows ope and desired temp when closed. Never even aware when ac cycles, plus the load when starting ac is greatly reduced as fan is already running.
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Old 11-29-2021, 11:51 AM   #10
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We run the A/C fans on high in the summer even with the A/C on. The Fan stays out for 1, to drown out the outside noise, and to keep air circulating.

In the winter, normally run the A/C fan on low while running electric heaters to help keep the heat dispersed more even.
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Old 12-01-2021, 09:39 AM   #11
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I use the rear A/C, fan only, when there is too much outside noises especially at night.
Dogs barking
High speed traffic
Trains
Planes
Emergency services
Early morning people leaving and going to work.
Sometimes my white noise machine isn't loud enough.
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