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Old 01-21-2019, 12:21 AM   #1
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Ventline Bathroom Fan Speed Controller Mod

I recently needed to replace the motor on my bathroom ventline fan as the bushing was wearing out.

Took the opportunity to also modify it with a speed controller so it's not always wailing at full speed. I usually like having this single fan on 24hr/day as a way to keep bathroom fresh, some general airflow and background noise in the trailer. So a speed controller has been high on my list to also keep power draw at bay.

I added this from Amazon:
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

It can actually replace the original on/off switch but I couldn't get it to mount nicely in that switches position. Here's my compromise:

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It works beautifully to set it anywhere between 10-100% speed. Or 10-100% noise, or 10-100% power draw. Nice fine control. No humming or whining noise to speak of. Why this isn't an OEM feature beats me.

Note for anyone wanting to use the same switch. Make sure to brigde the '3-15' solder pads on it before installing. It's setup for 24-35V before bridging.
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Old 07-15-2019, 09:58 PM   #2
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"Note for anyone wanting to use the same switch. Make sure to brigde the '3-15' solder pads on it before installing. It's setup for 24-35V before bridging."
HUH??????? This direction helps about as much as a teet on a bull does.
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Old 07-16-2019, 06:05 AM   #3
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Here, this may help.

This is a very nice idea! Running the fan for a short time works OK, but having the ability to let it run longer to move a little "air" without the noise, say at night, is a great idea. I'm going to add one to the shower also. We keep a small washing machine in there and it always feels damp and smells from the soaps we use. This is a perfect solution without using up to much power if boondocking.

Good call!
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Old 07-16-2019, 07:25 AM   #4
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Very nice mod. They should come with variable speed from the factory.
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Old 07-16-2019, 12:41 PM   #5
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Quote:
Originally Posted by bweybright View Post
HUH??????? This direction helps about as much as a teet on a bull does.
This might not be the best approach to get clarification or help.
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Old 07-16-2019, 05:28 PM   #6
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Cool
Did you have to notch the inner aluminum skin to make room for the speed control? I assume you did.
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Old 07-16-2019, 08:38 PM   #7
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Yes, will have to trim some aluminum enough to provide clearance against the board.

The speed controller can completely replace the original on/off switch in that position. If one can take the time to help it seat right against the relief there. I didn't find an easy way so I opted to mount it as a secondary control.

Perhaps if one used a controller like this with a remote knob, it could fit in the stock switch location which would be best:

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https://www.amazon.com/RioRandTM-Upg...%2C210&sr=8-54
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Old 07-22-2019, 04:53 AM   #8
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Nice idea. Question: Would you be able to use the speed controller where you installed it on the rim and just bypass/remove the original switch?
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Old 07-22-2019, 09:46 AM   #9
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^Yes. All these speed controller have an "off" detent at the knob of the speed control. So the stock red switch is unnecessary.
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'07 27FB Ocean Breeze "See Turtle", 3" lift
'09 Lexus LX570, on 33's
Tongue Mount Honda eu2200i - Rear Hitch - Underbelly Storage - Blizzard NXT w/ EasyStart - 3" Lift - 6" Fan Controller
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Old 07-23-2019, 06:27 AM   #10
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I did it

Since I saw this post I knew I had to do it. I ordered both controllers, from Amazon, shown below, but the big one just seemed too big to mount where I wanted it. So I used the smaller one. I mounted it up in the Ventline on the cross-brace with a VHB/tie wrap mounting plate. Nice and out of the way but close to the motor. I used marine speaker crimp connectors for the motor, perfect fit.
Best of all, I did not disconnect any of the original wiring except the slip-on connectors at the motor. That way, if this controller dies, on the road, I can just disconnect it and reconnect the original motor connections. Everything is shrink tubing wrapped to prevent any water intrusion. Works great! Thanks!
Larry
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Old 07-23-2019, 10:06 AM   #11
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Larry, what is the difference between the two different sized controllers you pictured?
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Old 07-23-2019, 10:21 AM   #12
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aside from size, the big one is rated for 6-90v and 15 amps, hence the big cooling fins. The little one is rated for a max of 15v and 2 amps, which seems adequate for the little fan. The smaller one is $7 and the larger one $11. The bigger one looked to have more margin for error of operation but when I saw the size, in the flesh, I realized i could not use the bigger one. According to Amazon reviews, someone has installed the bigger one in their Fantastic fan, but I think even that would be a challenge.
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Old 07-23-2019, 10:22 AM   #13
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Quote:
Originally Posted by lsbrodsky View Post
Since I saw this post I knew I had to do it. I ordered both controllers, from Amazon, shown below, but the big one just seemed too big to mount where I wanted it. So I used the smaller one. I mounted it up in the Ventline on the cross-brace with a VHB/tie wrap mounting plate. Nice and out of the way but close to the motor. I used marine speaker crimp connectors for the motor, perfect fit.
Best of all, I did not disconnect any of the original wiring except the slip-on connectors at the motor. That way, if this controller dies, on the road, I can just disconnect it and reconnect the original motor connections. Everything is shrink tubing wrapped to prevent any water intrusion. Works great! Thanks!
Larry
Nicely done Larry!

That was the way I was hoping to do it, but I didn't land on exactly the right controller without some iteration so I worked with what I had. That remote pot switch is the trick. Glad you found one that works!

Can you share a link to the small controller you used?
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Old 07-23-2019, 01:11 PM   #14
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Here you go!

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

Larry
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Old 08-05-2019, 05:17 AM   #15
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how to remove screen assembly?

give us a primer on the proper way to remove the handle/screen assembly on the vent fan to facilitate the installation of the fan speed control

Thanks
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Old 08-05-2019, 05:23 AM   #16
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OK, the handle needs to be pulled down. From the side, you will see a screw in each end. Remove the two screws and the handle pulls off. Then remove the two screws holding the screen. Note that this was not possible for the fan in the shower as the caulking and the additional height of the enclosure do not allow the handle to pull down far enough to access the screws. When I need to remove the screen, for cleaning, in the shower, I use a small right-angle ratchet screwdriver.
Larry
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