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04-09-2015, 12:10 AM
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#1
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Junior Member
Join Date: Apr 2015
Posts: 3
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Fan noise under fuse box?
Ok, this may be a silly question but my wife and I are first time RV owners. We are spending our first night out in our new trailer a 2015 Surveyor 226RBDS in our driveway of all places just to try it out. I plugged the trailer in and there is a fan like noise coming from under the fuse box. It's not loud but it will bug me when we lay down for the night. Any help with what this noise may be and how to stop it will be greatly appreciated. 
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04-09-2015, 12:54 AM
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#2
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Senior Member
Join Date: Jul 2013
Location: Oregon
Posts: 716
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It is most likely your Converter (converts the AC power from your house to 12v DC power to charge your battery and run your DC items while plugged in....lights, furnace, water pump, etc.).
Mine really bugs me too, but I am in the process of replacing it with a different system so I have been putting up with it. As long as the battery is fully charged, it only runs when there are multiple lights on...once you shut everything down for bed time, the fan should stop (as long as the battery is charged). If it doesn't stop, you may want to have it looked at.
__________________
'04 GMC Sierra 2500HD, CCSB, D/A, MaxBrake, B&W Companion, Retrax Pro, AR Power Steps
2021 Solitude 310GK w/FBP
1969 Camaro RS/SS Convertible
Dad's old 1968 Empi Imp (recently recovered from under 21 years worth of boxes/dust)
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04-09-2015, 01:40 AM
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#3
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Senior Member
Join Date: Feb 2015
Posts: 847
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Those smart charger fans should be smaller and quieter than the old linear style. I wonder if insulation in the cabinet paneling, back side, surrounding the unit would help? Might be worth some experimenting...
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04-09-2015, 02:48 AM
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#4
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Site Team
Join Date: Jan 2007
Location: Goodyear, Arizona
Posts: 33,835
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your battery may be depleted from the parasitic power drains, if you didn't use a battery disconnect switch.
therefore, the converter is busy recharging it and when you turn a bunch of lights on, it has to work harder thereby kicking in the cooling fan.
__________________
Dan-Retired California Firefighter/EMT
Shawn-Musician/Entrepreneur/Wine Expert
and Zoe the Wonder Dog(R.I.P.) 
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity
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04-09-2015, 11:22 AM
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#5
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LA-Lower Alabama Resident
Join Date: Apr 2015
Location: Mobile, AL
Posts: 34
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We are first timer's too and I noticed the same thing when we used ours for the first time this past weekend. I did notice that the sound increased/decreases when turning on/off the individual lights. The more lights that were on the louder the sound. The sound may not be a problem with all the lights off. I really didn't notice it at night but our bed is at the opposite end of the trailer.
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04-09-2015, 11:29 AM
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#6
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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The cooling fans for the converter run according to load.
More load the faster they will run.
Light to no load fans should stay off or only run occasionally.
TURBS
08 duramax tuned n modded, 32bhok Sabre
2015 camping "2 nights"
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04-09-2015, 11:49 AM
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#7
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Senior Member
Join Date: Jul 2013
Location: Oregon
Posts: 716
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For mine, the magic number seems to be 5 bulbs. With 4 (incandescent) bulbs on, no fan. With 6 bulbs (our "most used" light switches control 2 bulbs each) the fan kicks in.
I am in the process of installing a large Inverter/Charger in the front storage compartment so soon will no longer be annoyed by "the fan under the stairs" as it will be disconnected...yay! I had previously considered switching out to LED bulbs just to cut the fans run time down.
__________________
'04 GMC Sierra 2500HD, CCSB, D/A, MaxBrake, B&W Companion, Retrax Pro, AR Power Steps
2021 Solitude 310GK w/FBP
1969 Camaro RS/SS Convertible
Dad's old 1968 Empi Imp (recently recovered from under 21 years worth of boxes/dust)
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04-09-2015, 12:12 PM
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#8
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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Inverter charger?
TURBS
08 duramax tuned n modded, 32bhok Sabre
2015 camping "2 nights"
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04-09-2015, 12:50 PM
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#9
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Junior Member
Join Date: Apr 2015
Posts: 3
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Thank you all for your very quick replies to my question. Wow, I'm so impressed with this forum. I can tell it will be of great help for us first time RVers, 
I believe it was the converter as it did shut off in the night when everything was shut down. Thanks again for all of your assistance, it is greatly appreciated.
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04-09-2015, 12:56 PM
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#10
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Strongly suggest you switch all the 12v lights to led and it will probably never or rarely have to run. I switched our bulbs 2 years ago and haven't heard the fan kick on since.
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04-09-2015, 12:58 PM
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#11
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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Quote:
Originally Posted by OldCoot
Strongly suggest you switch all the 12v lights to led and it will probably never or rarely have to run. I switched our bulbs 2 years ago and haven't heard the fan kick on since.
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Probably quit working...[emoji12]
TURBS
08 duramax tuned n modded, 32bhok Sabre
2015 camping "2 nights"
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04-09-2015, 01:01 PM
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#12
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Quote:
Originally Posted by TURBS
Probably quit working...TURBS
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Converter is still working anyway.
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04-09-2015, 01:06 PM
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#13
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LA-Lower Alabama Resident
Join Date: Apr 2015
Location: Mobile, AL
Posts: 34
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Quote:
Originally Posted by OldCoot
Strongly suggest you switch all the 12v lights to led and it will probably never or rarely have to run. I switched our bulbs 2 years ago and haven't heard the fan kick on since.
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Is that something that you did yourself? I would like to have that done as well.
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04-09-2015, 01:33 PM
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#14
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Mod free 5er
Join Date: Mar 2008
Location: Concord, NC
Posts: 24,702
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Quote:
Originally Posted by mysticks1
Is that something that you did yourself? I would like to have that done as well.
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Yes, just a matter of switching bulbs.
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04-09-2015, 01:40 PM
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#15
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LA-Lower Alabama Resident
Join Date: Apr 2015
Location: Mobile, AL
Posts: 34
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Quote:
Originally Posted by OldCoot
Yes, just a matter of switching bulbs.
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Thanks - I will look into doing that.
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