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Old 10-03-2019, 03:26 PM   #1
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How can I slow the fan on my AC?

We just had two Brisk Air II 15K AC units installed. The good news is that they really cool the coach down. However, the 3 fan speeds start where my original unit fan speed maxed out. It is really noisy. There is no reason to keep the fans running that hard. Any ideas what I can do to reduce the fan speeds starting point? Low is actually stronger that High was on my old unit. We have a central control center to set the temp and fan speeds.
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Old 10-03-2019, 03:32 PM   #2
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Is there an auto setting that you can try?
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Old 10-03-2019, 03:36 PM   #3
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I don't think there is any way to do that unless the blower motor is replaced. 120 volt AC motors are wired (wound) to run at given speeds. If you have a three speed motor then there are three separate windings, each giving a speed based upon coil spacing within the motor.
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Old 10-03-2019, 07:11 PM   #4
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Well, there is a reason. If you don't move enough air over the evaporator, it can freeze up.
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Old 10-05-2019, 04:40 AM   #5
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Quote:
Originally Posted by Deep Water D View Post
Well, there is a reason. If you don't move enough air over the evaporator, it can freeze up.
Correct, you would need a multi or variable speed compressor similar in residential HVAC. Well if you wanted to do some engineering & install two VFD's maybe it could be done, lets not go there... LOL
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Old 10-05-2019, 05:05 AM   #6
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Have you called the MFG? Perhaps when the units were installed they were not compatible with a current thermostat? I"ve give tech support of the Brisk unit a call and talk with them...
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Old 10-05-2019, 05:10 AM   #7
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Quote:
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Is there an auto setting that you can try?


Auto setting does not change fan speed. It just turns the fan on and off with the compressor.
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Old 10-05-2019, 05:46 AM   #8
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Look into those sound deadener Waco Products are now selling.....not sure of spelling...
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Old 10-05-2019, 06:45 AM   #9
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To the the cooling out of a unit, there has to be a certain amount of air moved. These units are small, so you have to push more air through a smaller and you will get more noise.

As noted, there are a couple of sound reducing grills. Try one of these.

If you run the fan on low, you can easily ice the evaporator.

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Old 10-16-2019, 09:01 PM   #10
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Wackoproducts.com. is the place to buy The RV A/C Silencer
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Old 10-18-2019, 12:15 PM   #11
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Thank you so much for the suggestion. I have two of them on the way. I hope I can write the kind of testimonials that others have about the noise reduction.
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Old 10-20-2019, 07:10 AM   #12
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AccessMaster, please update on how they work out for you once you have a chance to try them out.
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Old 11-04-2019, 08:13 AM   #13
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These really made dramatic difference. They cut the noise level in half. Easy to install although I can make anything easy take an hour or two. The noise level has been solved.
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Old 11-16-2019, 08:03 PM   #14
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I had great results with the wacko products rv ac Silencer . Would not go without.
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